How to Fix Unknown Hard Error in Windows 10

Bttray.exe Application – What is it?

Bttray.exe is basically a Bluetooth Tray Application. Bluetooth Tray Application is developed by WIDCOMM. It provides a system tray icon that allows users to see the status of their Bluetooth connections at a glance. It allows you to easily access the configuration and settings for the Bluetooth products enabling you to change the configuration of the Bluetooth devices. The bttray.exe application error may pop up on your computer screen due to some issue with the Bluetooth software. The process fails to initialize and therefore stops working. Bttray.exe application error code is  displayed in the following format:

• “BTTray.exe can’t initialize (0xc0150004).”
• “BTTray.exe – System Error”

Though this is not a fatal or critical computer error it is advisable to resolve it otherwise it will hamper your access to Bluetooth software and cause you a great deal of inconvenience.

Solution

Error Causes

Bttray.exe application error code may be triggered due to one of the reasons stated below:

• Bttray.exe application is damaged
• Bttray.exe is accidentally removed from your PC
• The Bluetooth software or driver becomes problematic.
• Some modules that run by the process are corrupt
• Malware infection
• Invalid registry entries

Further Information and Manual Repair

If you experience a bttray.exe application error code on your system, it is recommended to fix it right away. To resolve this error you don’t have to be a computer programmer or a technical whiz or have to hire a professional and spend hundreds of dollars in repair. It is easy to fix, simply follow the manual methods given below:

Method 1- Reinstall Bluetooth Software

If the Bluetooth Software is damaged or outdated, the bttray.exe will also not work. If this is the cause of the error code, then simply reinstall Bluetooth software on your system. To do this, first, uninstall the current software and then download the latest version of the Bluetooth Software on your PC. To uninstall click start, go to the control panel, and then programs. Now select Bluetooth software and click uninstall to remove it. After that, install the latest version and update it. To activate changes

Method 2: Scan for Malware

Sometimes the bttray.exe application error code may pop up due to malware and viral infection. To fix it, download a powerful antivirus. Scan and remove malware to resolve.

Method 3: Clean Registry

The registry basically saves all the activities being performed on the PC including junk and obsolete files. If the registry is not clean frequently, unnecessary files like cookies, junk files, temporary files, and internet history can take up a lot of space and cause the registry to damage. Due to this error code like the bttray.exe application can also pop up. To resolve, clean the registry. You can do it manually but that may be difficult and time-consuming if you are not a computer programmer. However, a good alternative would be to download Restoro. This is a user-friendly and next-generation PC Fixer deployed with multiple utilities like a registry cleaner and an antivirus. Simply run it to remove viruses and clean the registry. Click here to download Restoro and resolve the bttray.exe application error now!

A general rule of thumb, which is followed by most users, is to download the specific missing DLL file and place it within the software’s installation directory. However, this can be harmful to your system as hackers often upload popular malicious DLL files to target systems. Thus, you should avoid downloading DLLs from the internet. And follow these steps to fix the DLL error:

• Restart your computer
• System restore to an earlier state
• Run a malware/virus scan
• Update all the hardware drivers
• Running SFC /scannow command in command prompt
• Then do as the error suggests, reinstall the program if it’s feasible. Game files can take several hours to install and therefore, reinstallation can be a cumbersome job. Also, frustrating if the error appears after reinstallation.
• Update device drivers manually, such as graphics drivers, DirectX software if you see DLL missing error while running game

Microsoft just released Windows 11 ISo file, based on the latest Insider Preview Build 22000.132. Inside build, you can try all-new features like clock updated app, snip tool, and everything releases so far via various patches. You can also use Windows 11 ISO file to do a clean install on your computer, but if you go with this option all of your existing files will be deleted. Microsoft says it added the ability to name your PC during the setup experience. You’ll also get to experience the Get Started app that’s designed to help you get going on your new Windows 11 PC (even if it’s not actually a new one).

Download ISO

• Go to the Windows Insider Downloads page. You will need to sign in with a Microsoft account registered with the Insider Program.
• Scroll down to Select Edition and select the build you want to download. You will most likely want the one at the top from the developer channel, as this is where Windows 11 should arrive first. So far, only Windows 10 builds are available. Click confirm.
• Select your preferred language. Not all languages ​​available for Windows are compatible with the Insider program, so you may have to stop depending on where you are from.
• Click the download button and the ISO file will start downloading.
• This is definitely an easier method, but unfortunately, it is not available yet. We will update this article once Windows Insider ISOs are available. Later, once Windows 11 64 bit is available to everyone, you can also download the stable build of Windows 11 iso. Microsoft offers the Media Creation Tool and Upgrade Assistant, which usually do just that. It will be some time before Windows 11 versions of the tools are available, as the operating system is only getting closer to this holiday.

Resize icons on desktop in Windows 10 in a matter of seconds! Hello everyone and welcome to today's quick tip. If you have ever been dissatisfied with icon size on your desktop and any of the default sizes like small, medium large, etc have not been appropriate know that there is a quick way to resize icons on your desktop in between sizes. All that you have to do in order to use this built-in feature is: Press and hold CTRL and scroll with the mouse. That's it! Find your appropriate size for icons and enjoy.

Windows defender error 0x800700AA, service can not be started comes when the user is trying to run Windows defender scan on their system. This kind of behavior happens for two reasons mostly, third-party application conflict or corrupted system files. In this article, we will tackle both scenarios and provide you with solutions in both cases.

Third-party application conflict

In this rare scenario when Windows defender can not start scan due to conflict with installed service or application in the system solution is quite simple. Restart your PC into safe mode and run the scan from there. In a safe mode environment, minimum drivers and services are only loaded eliminating any conflicts that might occur when everything is booted. If Windows defender can not run the scan in safe mode and you get the same 0x800700AA error then you can eliminate application conflict as a reason and move to the next solution which will tackle corrupted system files. If you, however, managed to run a scan then you have a rare third-party application conflict, you can boot normally into windows and try to eliminate one by one to see which one is causing the issue. The safest bet would be to start with security software because most of the time that is what causes conflicts in running services and applications.

Corrupted system files

If the previous solution has not provided you with results then you have system file corruption that needs to be fixed. Move from one solution to another as presented below:

1. Run SFC scan

   SFC scan is a built-in Windows tool for solving corrupted system files issues, it is fully automated and does not require from the user any kind of knowledge or information. To run it and scan the system do the following: Press ⊞ WINDOWS + X to open the secret menu Left-click on the command prompt (admin) In command prompt type SFC /SCANNOW and press ENTER Wait for the process to finish, do not interrupt it and once it is done, restart your computer

2. Run DISM scan

   DISM scan is similar to SFC scan but it tackles different types of system file corruption and it is recommended to run it also after SFC has been completed. Please note that for DISM scan to be successful you will need a stable internet connection since DISM will replace corrupted files with new ones downloaded from Microsoft. To run it do the following: Press ⊞ WINDOWS + X to open the secret menu Left-click on the command prompt (admin) inside command prompt type: exe /online /cleanup-image /scanhealth followed by ENTER, then type: Dism.exe /online /cleanup-image /restorehealth also followed with ENTER. Leave scan to finish and reboot your PC

Linkey is a potentially unwanted web browser search extension for the top browsers, designed to modify the user’s search and home pages in order to direct advertising. This extension changes your default search provider, redirects new tabs, and distributes information & statistics to the server. This extension will display unwanted ads, redirect you through unwanted search engines, and send your browsing information (potentially private information) back to its ad network.

From the publisher: Linkey is compatible with all the latest versions of Internet Explorer, Chrome, and Firefox. Linkey is a simple browser extension that allows you to get the best sites in one click in visualized & friendly interface.

About Browser Hijackers

Browser hijacking is actually a type of unwanted software, often a browser add-on or extension, which causes modifications in the browser’s settings. Browser hijackers could do many different things on your PC. Usually, hijackers will force hits to websites of their preference either to increase traffic producing higher advertisement revenue, or to obtain a commission for each and every user visiting there. Nonetheless, it’s not that harmless. Your online safety is compromised and it is also extremely annoying. Browser hijackers could also allow other malicious programs without your knowledge to further damage your computer.

How to know whether the web browser is hijacked?

The typical symptoms that suggest having this malicious software on your PC are: 1. your homepage has been reset to some unfamiliar site 2. your browser is constantly being redirected to adult sites 3. the essential web browser settings are modified and undesirable or insecure resources are put into the trusted sites listing 4. unsolicited new toolbars are added to your browser 5. you may notice endless pop-up ads on your screen 6. your web browser starts running sluggishly or exhibits frequent errors 7. You simply can’t access particular sites, particularly anti-malware websites.

How it infects your computer

Browser hijackers attack computers through malicious e-mail attachments, downloaded infected computer files, or by checking out infected internet sites. They could be included with toolbars, BHO, add-ons, plug-ins, or browser extensions. Also, certain freeware and shareware can put the hijacker in your PC through the “bundling” technique. Examples of well-known browser hijackers are Fireball, GoSave, Ask Toolbar, CoolWebSearch, Babylon Toolbar, and RocketTab. Browser hijackers could interrupt the user’s browsing experience severely, keep track of the websites visited by users and steal financial information, cause problems in connecting to the internet, and ultimately create stability issues, making applications and computers crash.

How you can get rid of a browser hijacker

Some hijackers can be simply removed by deleting the free software they came with or by removing any extension you have recently added to your computer. Unluckily, the majority of the software products used to hijack a browser are deliberately built to be difficult to eliminate or detect. Moreover, manual removals demand in-depth system knowledge and therefore can be an extremely difficult job for novices.

What To Do When You Cannot Download Safebytes Anti-Malware?

All malware is bad and the magnitude of the damage may vary greatly in accordance with the type of infection. Certain malware variants modify internet browser settings by including a proxy server or modify the computer’s DNS configurations. When this happens, you will be unable to visit some or all of the websites, and therefore unable to download or install the necessary security software to remove the malware. If you’re reading this, you may have infected by a virus that prevents you from downloading computer security software like Safebytes Anti-Malware. There are a few options you can attempt to get around with this obstacle.

Install in Safe Mode

The Windows-based PC has a special mode called “Safe Mode” in which just the bare minimum required programs and services are loaded. If the malware is blocking internet access and affecting your PC, running it in Safe Mode will let you download antivirus and run a diagnostic scan while limiting potential damage. In order to get into Safe Mode or Safe Mode with Networking, press F8 while the system is starting up or run MSConfig and look for the “Safe Boot” options under the “Boot” tab. After you restart into Safe Mode with Networking, you could download, install, as well as update anti-malware software from there. After installation, run the malware scanner to remove most standard infections.

Use an alternate browser to download an antivirus application

Certain viruses might target vulnerabilities of a specific web browser that obstruct the downloading process. If you appear to have a virus attached to Internet Explorer, then switch over to an alternate internet browser with built-in safety features, such as Chrome or Firefox, to download your favorite antivirus program – Safebytes.

Install security software on a thumb drive

Here’s another solution which is creating a portable USB anti-malware software that can check your system for malicious software without needing installation. Do these simple actions to clean up your affected PC using portable anti-malware. 1) Download the anti-malware program on a virus-free computer. 2) Plug the Flash drive into the clean computer. 3) Double-click on the downloaded file to open the installation wizard. 4) Choose the USB flash drive as the destination for saving the software file. Follow the on-screen instructions to finish the installation. 5) Unplug the USB drive. You may now utilize this portable anti-malware on the infected computer system. 6) Double click the Safebytes Anti-malware icon on the flash drive to run the software. 7) Click on “Scan Now” to run a complete scan on the infected computer for malware.

A Look at the Best AntiMalware Program

Want to download the very best anti-malware software for your laptop? There are several applications in the market that come in paid and free versions for Microsoft Windows systems. Some of them are excellent, some are ok types, while some will destroy your PC themselves! When searching for an anti-malware tool, choose one which provides dependable, efficient, and complete protection against all known computer viruses and malware. On the list of highly recommended software programs is SafeBytes AntiMalware. SafeBytes carries a good track record of top-quality service, and customers are very happy with it. Safebytes is one of the well-established computer solutions companies, which offer this all-inclusive anti-malware software. Using its cutting-edge technology, this application will allow you to eradicate multiples types of malware such as computer viruses, trojans, PUPs, worms, ransomware, adware, and browser hijackers. SafeBytes has got a variety of wonderful features that can help you protect your PC from malware attacks and damage. Below are some typical features present in this tool: Live Protection: SafeBytes offers a totally hands-free active protection that is set to observe, prevent and remove all threats at its very first encounter. This utility will always monitor your computer for any suspicious activity and updates itself regularly to keep current with the newest threats. Most Reliable AntiMalware Protection: This deep-cleaning anti-malware software program goes much deeper than most antivirus tools to clean your computer system. Its critically acclaimed virus engine finds and disables hard-to-remove malware that conceals deep inside your PC. Internet Security: Through its unique safety rating, SafeBytes notifies you whether a site is safe or not to access it. This will make sure that you’re always certain of your safety when browsing the net. Lightweight Utility: The program is lightweight and can run silently in the background, and that does not have an effect on your PC efficiency. 24/7 Live Professional Support: SafeBytes provides 24/7 technical support, automatic maintenance, and upgrades for the best user experience.

Technical Details and Manual Removal (Advanced Users)

If you wish to manually remove Linkey without the use of an automated tool, it may be possible to do so by removing the program from the Windows Add/Remove Programs menu, or in cases of browser extensions, going to the browsers AddOn/Extension manager and removing it. You will likely also want to reset your browser. To ensure the complete removal, manually check your hard drive and registry for all of the following and remove or reset the values accordingly. Please note that this is for advanced users only and may be difficult, with incorrect file removal causing additional PC errors. In addition, some malware is capable of replicating or preventing deletion. Doing this in Safe Mode is advised.

The following files, folders, and registry entries are created or modified by Linkey

Stop 0x0000000A - What is it?

Stop 0x000000A is a type of blue screen of death error associated with Windows XP. It occurs either during or after the installation of Windows XP. In other cases, the stop 0x000000A error may occur when the device driver uses an incorrect memory address, causing an IRQ conflict. The Stop 0x000000A error message means that a process or a driver attempted to access a memory section without permission.  The stop error message is displayed in the following format:

Stop: 0x0000000A (parameter1, parameter2, parameter3, parameter4) IRQL_NOT_LESS_OR_EQUAL *** Address x has base at x - filename

Solution

Error Causes

The stop 0x000000A error is triggered due to multiple reasons. These include:

• Faulty hardware
• The poor device driver installation
• Incompatible device driver
• Viruses and malware attack
• Disk fragmentation

Blue screen of death errors like the stop 0x000000A error code is critical. These errors may pose serious PC threats. When this error occurs the computer screen turns blue, the program running on the system stops and if the error is not fixed in time it may also result in a system crash and failure.

Further Information and Manual Repair

To resolve the Stop 0x000000A error on your PC, here are some solutions that you can try:

1. Roll Back Drivers

To do this, click on the start button and go to the control panel. Then double click the system icon and locate the ‘System Properties’ window. After that click on the ‘hardware’ tab and then click the ‘Device Manager’ button. Here locate the device that you recently updated which could be causing the IRQ conflict. Now double click the device recently updated and click the driver tab. Then click on the ‘Roll Back Driver' button. Wait for the process to finish and then simply reboot your system.

2. Specify the Hardware Abstraction Layer (HAL)

Another method to resolve the Stop 0x000000A error on your system is to specify the hardware abstraction layer (HAL). This can be done during Windows XP installation startup. Simply press the F5 button on your keyboard while the “Setup is inspecting your computer’s hardware configuration’. When prompted, make sure that you specify the correct computer type and HAL (the Hardware Abstraction Layer). Most computers use a single processor, if your computer also has a single processor then simply select ‘Standard PC HAL’ computer type from the menu. Now reboot your PC and then reinstall the Windows XP operating system. If the error is still not resolved then try turning off features in CMOS settings

3. Turn off Features in CMOS Settings

Turn off all the following features in the CMOS settings:

• All caching, including L2, BIOS, internal/external, and write back caching on disk controllers
• Plug and Play
• All shadowing
• Any BIOS-based virus protection feature

After turning off these features, try reinstalling Windows XP again. If this works, then that’s great! However, if it doesn’t, then try method 4; maybe the cause of the stop 0x000000A is associated with incompatible drivers.

4. Install Windows XP compatible Drivers

Sometimes device driver compatibility can also shoot up the stop 0x000000A error message. First, remove the drivers that are incompatible with Windows XP. Now obtain and install new Windows XP compatible drivers. To do this, go to the start menu and the control panel. Now double click on Add or Remove Programs icon. Select the drivers that are incompatible with Windows XP and click on the remove button. After that restart PC and install Windows XP, compatible drivers, for the hardware devices on your system.

5. Scan for Viruses and Repair the Registry

If all the methods discussed above do not resolve the stop 0x000000A error on your PC, then it means either your computer is affected by an infection virus or the problem is associated with the registry like disk fragmentation and invalid entries. To scan for both viruses and registry issues simultaneously in seconds, it is advisable to download Restoro. Restoro is an advanced and multi-functional PC repair tool integrated with powerful utilities including a registry cleaner, antivirus, and a system optimizer. It also scans for Active X controls and class ID errors. The registry cleaning utility scans your entire PC for all possible registry issues triggering different error codes including the stop 0x000000A error. It wipes out all the unnecessary files cluttering and damaging the registry including cookies, temporary files, junk files, and invalid entries. It repairs the fragmented disk and the registry thereby resolving the stop 0x000000A error on your system. The privacy error utility functions like an antivirus. It detects all kinds of malicious software on your system including malware, adware, spyware, and viruses. These are removed immediately thus making your PC error-free. Restoro is safe, efficient, and user-friendly. It is compatible with all Windows versions including XP.  It has a sophisticated interface and a neat layout which makes it quite easy to operate and workaround. Click here to download Restoro and repair your PC and resolve the stop 0x000000A error code now!

Recently, a number of Windows 10 users reported an issue wherein they try to print from their PCs but were unable to and got an error message instead that states, “Port in use, please wait”. However, no matter how long they waited, nothing changed and they were still unable to print from their computers. On the other hand, when some of the users attempted to print wirelessly from their mobile devices, the printing continues which indicates that there is some issue between the computer and the printer. So if you are one of the users who are currently facing this problem, then this post should help. To fix this issue with your Printer, here are some possible fixes you can try that might work.

Option 1 – Run the Printer Troubleshooter

The first thing you can do to fix the “Port in use, please wait” error is to run the Printer Troubleshooter. This built-in troubleshooter in Windows 10 can help you fix most print issues. It checks if you have the latest printer drivers and then tries to fix and update them automatically. Aside from that, it also checks if you have connectivity issues or if the Print Spooler and the required Services are running fine. To run it, follow the steps below.

• Tap the Win + R keys to open the Run dialog box.
• Next, type “msdt.exe /id PrinterDiagnostic” in the field and click OK or hit Enter to open the Printer Troubleshooter.
• Then click the Next button and follow the next on-screen instructions to fix the issue with the printer.

Option 2 – Try updating the Printer drivers

You might also want to try updating your printer drivers. All you have to do is locate the USB Composite Device. For complete details, follow the steps below.

• First, click the Start button and type “device manager”.
• Then click on the “Device Manager” from the search results to open it.
• From there, look for the USB Composite Device option and right-click on it, and select the Update Driver from the options.
• Restart your PC and then click the “Search automatically for updated driver software” option.

Note: You also have the option to download the latest version of your Printer from the manufacturer’s website.

Option 3 – Try selecting the correct port for your Printer

If the first two options given above didn’t work, then maybe it’s time to select a correct port for your printer since the wrong port has been selected which is why you’re getting the “Port in use, please wait” error.

• Open “Devices and Printers” from the Start search.
• Next, look for your printer from the list of devices and right-click on it, and then select Printer Properties.
• Now go to the Ports tab under the newly opened Properties window and make sure that the port type matches the connection on the list of ports currently in use.

Note: If your printer is using a USB connection then the port should have a USB or DOT 4 in its description but if your printer is using a network connection then it should have the following description:

• WSD
• Network
• IP

And if you notice that there are several listings for the same type of port, you have to change the selection to a different one and then click the OK button to save the changes made.

What is 0x80070002 Error Code?

0x80070002 error message triggers Windows update problems. This error code pop prevents you from successfully updating Windows operating system and its installed components. Windows update is necessary to keep the system up to date and efficient. It also helps you close security holes in your system and prevents your system from being infected by viruses or hacked.

Solution

Error Causes for 0x80070002

This error code pops up on the screen and results in an unsuccessful Windows update, when either your system has wrong date/time settings or when Windows update temporary folder is corrupted. The latter cause is the one to be worried about as it usually results from malware, viral infection, and registry corruption and damage. If this error code is not fixed timely it can lead to system crash and failure too.

Further Information and Manual Repair of 0x80070002

The best way to fix the 0x80070002 Windows update error code is to download Restoro on your system. Restoro is a new, powerful, intuitive, and cutting-edge PC fixer that serves as both a registry cleaner and a system optimizer. It is integrated with multiple performance-boosting and highly functional utilities. With this helper, you can resolve the maximum number and types of PC issues in a few seconds. This tool spares you from the hassle of finding and detecting the underlying cause of the error 0x80070002. Its intuitive built-in technology automatically detects and identifies the error and its causes and repairs it right away. Restoro includes utilities like registry cleaner, privacy issue detector, Active X and Class cleaner, and system stability scanner. The registry cleaner feature assists users to clean up registry clutter. This includes clearing junk files, temporary files, and invalid registry entries which take up all the disk space causing the registry to get corrupted and hampering Windows updates. It repairs the corrupt registry in no time allowing you to perform successful Windows updates.

Restoro Privacy Features

Nonetheless, if the error 0x80070002 occurs due to malware, Restoro will scan and repair it too. Its advanced privacy error anti-virus built-in feature scans for all types of malware, spyware, and viruses quickly and removes them from your PC. This ensures that your PC remains safe from malicious malware that can cause unsuccessful Windows updates and error codes like 0x80070002. Restoro is compatible with all Windows versions. It has a sophisticated and easy-to-use layout making it easier for users of all levels to use it without any complexity or hassle. It is safe and efficient.  It also helps boost the speed of your PC thus lowering boot time tremendously. For user safety, Restoro advises users to create backup files. This helps retrieve valuable data and files in the event of data loss during repair which rarely happens; but in case it does, you don’t have to suffer from a big loss.

Get Restoro

To get started, all you have to do is download and install Restoro on your system. After downloading, run it on your PC for a scan. Once the scanning is complete, a comprehensive scan report will be displayed on your screen showing you the errors affecting your system including 0x80070002 errors that you’ve been experiencing when performing Windows updates. To resolve issues on your PC right away, simply click on repair.  This will repair the error 0x80070002 issues on your PC in seconds. After your PC is repaired, you can then perform a Windows update again. It will be executed successfully. Click here to download Restoro today!

Error Code 0x8007007b – What is it?

This error code occurs when users fail to activate their Windows operating system. It is one of the more popular Windows error codes since it affects many versions of Windows including Windows 7, Windows 8.1, and Windows 10. Error code 0x8007007b has common symptoms which include the following:

• Inability to activate a Windows installation
• Message box highlighting error code 0x8007007b

Solution

Error Causes

Error code 0x8007007b in Windows 8.1 usually results due to one or more main clauses. Windows 8.1 users may experience this error due to the use of volume-licensed media. The error code may also arise if the activation wizard is unable to connect to Key Management Service (KMS) host computer or if corrupted system files are present on your computer.

Further Information and Manual Repair

Windows error codes such as Error code 0x8007007b can be a complicated issue, requiring the use of technical knowledge and skills. For this reason, we have listed instructions in the simplest of forms to enable even average users to successfully complete manual repair methods that will resolve error code 0x8007007b.

The same approach has been applied to all our error code solutions. See also Error Code 0x00000024 and Error Code 0x80004005.

Below are the two main methods for correcting this issue.

Method One: Use Multiple Activation Key (MAK) to Activate Windows

This method involves the use of a Multiple Activation Key (MAK) instead of the Key Management Service (KMS) to activate the Windows operating system you intend to use on your PC. This manual repair method requires the use of Command Prompt so ensure you follow the instructions provided carefully so as to avoid the risks of causing harm to your system.

• Step one: Select Windows log key + X.
• Step two: Click Command Prompt, then Admin
• Step three: Type in admin password if Command Prompt requests it
• Step four: Type slmgr -ipk followed by the MAK product key. Note that the product key should have 25 characters with dashes between them like this xxxxx-xxxxx-xxxxx-xxxxx-xxxxx

Attempt to activate your Windows installation once you’ve completed the exact instructions above. If you are unable to complete this process, consider getting help from a Windows repair technician or simply move to the next manual repair method listed below.

Method Two: Run System File Checker

System File Checker (SFC) enables Windows users to scan and repair errors or corruption on system files. Since such errors within your system files can cause error code 0x8007007b to occur, follow the steps below to fix this error code.

• Step One: Go to Start and type Command Prompt or CMD.
• Step Two: Run as Administrator
• Step Three: Type sfc /scannow with a space between “sfc” and “/scannow”.

The System File Checker tool will begin scanning your machine for corrupted or missing files in need of repair. If these files are found on your system, the tool will repair and replace them. Once this is done, restart your computer then check to see if you can now activate your Windows operating system.

Method Three: Use an Automated Tool

If you wish to always have at your disposal a utility tool to fix these Windows 8 and other related issues when they do arise, download and install a powerful automated tool.