Fix 169 IP address error in Windows 10

Error code 0Xc004F074 - What is it?

Did you previously use Windows 7 or 8 but decided to run with the latest Windows 0S, Windows 10? An early error message encountered was activation error code 0Xc004F074. Error code 0Xc004F074 is manifested when the user fails to activate Windows directly after the installation of Windows 10. This occurs if the previous operating system on your computer was Key Management Service (KMS) activated.

The KMT provides a more seamless operation when users are activating volume license editions of Microsoft Windows and Office. This process tends to be clear to end-users of the system.

Symptoms of error code 0Xc004F074 include:

• Windows is unable to reach your company’s activation service.
• The Key Management Service is unavailable.

Solution

Error Causes

Various factors might incite error code 0Xc004F074. A primary cause is a discrepancy or difference between the KMS client and the KMS host machine. The host computer could possibly be operating a Windows Server 2003 or Windows Server 2008, while the client runs on OS Windows 7 or Windows Server 2008 R2. To supplement, the computer’s time might be a contributing factor. The time on the host machine and client might show a difference (Usually the host time exceeds 4 hours).

Further Information and Manual Repair

To rectify error code 0Xc004F074, users are advised to try various methods. These methods include:

1. Method 1: Update Your KMS Host 9 (Windows Server 2003)

Are you running later versions of Windows Server? Use an update that fixes or installs KMS on your computer. The update is available on Microsoft’s website. Keep clearly in mind that the update is only for Windows Server 2013 Service Pack 1 and later versions of Windows Server 2003.

2. Method 2: Update Your KMS Host 9 (Windows Server 2008)

This step is similar to the aforementioned. However, it applies to Windows Vista and Windows Server 2008. This ensures the service is extended to Windows 7 and Windows Server 2008 R2.

3. Method 3: Update the Time

It was previously mentioned that the time reflected on the KMS host and client might cause error code 0Xc004F074 to manifest. A simple fix to adhere to is to always ensure that the time between both is updated. To Resync the time on the client, execute the following command.

w32tm /resync

4. Method 4: Uninstall the Existing KMS

For this method to be successfully deployed, you’ll need to have in your possession an activation key or KMSpico Key. As you cannot apply the new key with the existing one, remove or uninstall the initial key. To perform this step, open the command prompt. This should be done while the computer is in admin mode. Then, run the command

(slmgr.vbs /dlv)

It should be executed without the brackets and before you have removed the existing key.

After executing the command, you’ll encounter the description:

Windows(R) Operating System, VOLUME_KMS_WS12_R2 channel

Move along with the process by applying the slmgr.vbs /upk to uninstall the existing KMS key.

After the old key is uninstalled, you’re ready to apply the following:

slmgr.vbs /ipk <NewKMSProductKey>

To check if things are in place and complete the process, follow the steps below: PC Settings >Update and Security > Activation

5. Method 5: Download 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.

DiscoverAncestry is a Browser Extension for Google Chrome developed by Mindspark Inc that presents itself as a web tool to discover the origins or meanings of particular family names. When installed this extension changes your default new tab page to search by MyWay, as well as your default search engine to Search.MyWay.com

While active, DiscoverAncestry logs user browsing information, recording clicked links, visited websites and viewed products. This information is later used to better target personal ads. Browsing the internet with this extension active will result in injection of additional ads, sponsored content and even pop-up ads throughout the browsing sessions.

DiscoverAncestry is usually found bundled with other potentially unwanted software, this combined alongside its aggressive ad injection is why DiscoverAncestry has been marked as a Browser Hijacker, and it is recommended to remove it from your computer.

About Browser Hijackers

Browser hijacking is regarded as the web’s constant risks that target web browsers. It’s a type of malware program that redirects web browser requests to other suspicious websites. Basically, most browser hijackers are made for advertising or marketing purposes. It redirects you to the sponsored websites and inserts adverts on your internet browser which helps its developer generate income. It might seem naive, but the majority of such websites aren’t legitimate and can pose a significant risk to your on-line safety. In a much worst case, your internet browser could be hi-jacked to download malware that will do a lot of damage to your computer.

Browser hijacking signs and symptoms

There are several symptoms that could indicate a browser hijacking: 1. your homepage is reset to some unknown site 2. bookmark and the new tab are also changed 3. default online search engine is modified 4. you’re getting browser toolbars you haven’t witnessed before 5. you will find random pop-ups start showing regularly 6. your internet browser has instability issues or exhibits frequent errors 7. you are blocked to access the websites of antivirus solution providers.

How does a computer get infected with a browser hijacker?

Browser hijackers can get into a computer by some means or other, for instance via file sharing, downloads, and email also. Many web browser hijackings originate from add-on applications, i.e., toolbars, browser helper objects (BHO), or extensions added to web browsers to give them extra features. A browser hijacker may also come bundled-up with some free application that you inadvertently download and install, compromising your PC security. Common examples of browser hijackers include CoolWebSearch, Conduit, Coupon Server, OneWebSearch, RocketTab, Snap.do, Delta Search, and Searchult.com. Browser hijackers may record user keystrokes to gather potentially valuable information leading to privacy issues, cause instability on systems, drastically disrupt user’s browsing experience, and eventually slow down the computer to a stage where it becomes unusable.

Removal

Some browser hijacking can be simply reversed by discovering and eliminating the corresponding malware software through your control panel. However, many hijackers are really tenacious and need specialized applications to remove them. Also, manual removals demand deep system understanding and thus can be quite a difficult task for novices. Professionals always suggest users eliminate any malicious software including browser hijackers by using an automatic malware removal tool, which is easier, safer, and faster than the manual removal procedure. To remove any kind of browser hijacker from your laptop or computer, you should download the following certified malware removal tool – SafeBytes Anti-Malware. Along with anti-virus software, a system optimizer tool, similar to Total System Care, will help you repair Windows registry errors, get rid of unwanted toolbars, secure your online privacy, and stabilize programs installed on your computer.

Learn How to Get rid of Malware that is Blocking Websites or Preventing Downloads

Viruses may cause a lot of damage to your computer. Some malware sits in between your PC and the internet connection and blocks some or all internet sites that you really want to visit. It will also prevent you from adding anything to your PC, particularly antivirus applications. If you’re reading this article, you probably have affected by a virus that prevents you from downloading a security program like Safebytes Antimalware on your PC. There are some actions you can take to circumvent this issue.

Install anti-malware in Safe Mode with Networking

In the event the malware is set to run at Windows start-up, then booting in safe mode should avoid it. Just bare minimum required programs and services are loaded when you boot your PC in Safe Mode. Here are the steps you need to follow to start into the Safe Mode of your Windows XP, Vista, or 7 computers (check out the Microsoft website for instructions on Windows 8 and 10 computers). 1) At power on, press the F8 key while the Windows splash screen begins to load. This should bring up the Advanced Boot Options menu. 2) Choose Safe Mode with Networking using arrow keys and hit Enter. 3) Once you get into this mode, you will have an internet connection again. Now, obtain the malware removal program you need by utilizing the web browser. To install the program, follow the directions within the setup wizard. 4) Right after installation, do a complete scan and allow the software eliminate the threats it finds.

Utilize an alternate browser to download antivirus software

Some malware only targets certain browsers. If this sounds like your situation, utilize another internet browser as it can circumvent the malware. The ideal way to avoid this problem is to opt for a internet browser that is known for their security features. Firefox contains built-in Phishing and Malware Protection to keep you safe online. Create a portable USB antivirus for removing viruses Another method is to download and transfer an anti-malware application from a clean PC to run a virus scan on the infected computer. To run antivirus using a USB drive, follow these simple measures: 1) Make use of another virus-free computer system to download Safebytes Anti-Malware. 2) Plug the USB drive into the clean computer. 3) Double-click the executable file to open the installation wizard. 4) When asked, choose the location of the USB drive as the place where you want to store the software files. Follow the on-screen instructions to finish the installation. 5) Transfer the flash drive from the clean computer to the infected computer. 6) Double-click the anti-malware software EXE file on the pen drive. 7) Run Full System Scan to identify and clean-up up all sorts of malware.

SafeBytes Anti-Malware: Lightweight Malware Protection for Windows Computer

If you are looking to purchase anti-malware for your desktop, there are numerous brands and packages for you to consider. A few are well worth your money, but most aren’t. When looking for an antivirus tool, select one which provides dependable, efficient, and comprehensive protection against all known computer viruses and malware. On the list of highly recommended applications by industry leaders is SafeBytes Anti-Malware, well-known security software for Windows computers. SafeBytes is a powerful, real-time anti-spyware application that is made to assist everyday computer users in safeguarding their computers from malicious threats. Once you’ve got installed this software, SafeBytes advanced protection system will make sure that absolutely no viruses or malicious software can seep through your PC.

There are lots of amazing features you’ll get with this security product. The following are some typical features present in this software program:

Active Protection: Malware programs aiming to get into the system are discovered and stopped as and when detected by the SafeBytes real-time protection shields. This utility will always keep track of your computer for any suspicious activity and updates itself continuously to keep current with the latest threats. World-class AntiMalware Protection: Built upon a highly acclaimed antivirus engine, this malware removal tool can find and get rid of various obstinate malware threats such as browser hijackers, PUPs, and ransomware that other typical anti-virus applications will miss. Fast Multi-threaded Scanning: SafeBytes’s virus scan engine is one of the fastest and most efficient within the industry. It's targeted scanning tremendously increases the catch rate for viruses which is embedded in various computer files. Web Protection: SafeBytes provides instant safety rating about the webpages you’re about to visit, automatically blocking dangerous sites and to make sure that you’re certain of your online safety while browsing the net. Lightweight Utility: This software is lightweight and will work silently in the background, and will not impact your PC efficiency. 24/7 Customer Service: You can obtain totally free 24/7 technical support from their IT experts on any product queries or computer security issues. SafeBytes has created a wonderful anti-malware solution to help you conquer the latest computer threats and virus attacks. Now you may realize that this particular software does more than just scan and eliminate threats from your computer. So if you are searching for the best anti-malware subscription for your Windows-based computer, we strongly recommend SafeBytes Anti-Malware software.

Technical Details and Manual Removal (Advanced Users)

If you don’t want to use an automated tool and prefer to eliminate DiscoverAncestry manually, you might do so by going to the Windows Add/Remove Programs menu in the control panel and deleting the offending software; in cases of web browser plug-ins, you can remove it by visiting the browsers Add-on/Extension manager. You might even want to reset your web browser settings, and also delete temporary files, browsing history, and cookies. To ensure complete removal, manually check your hard disk and registry for all of the following and remove or reset the values accordingly. Please remember that this is for skilled users only and may be challenging, with wrong file removal leading to additional system errors. Furthermore, certain malware keeps replicating which makes it tough to eliminate. You are suggested to do this process in Windows Safe Mode.

In Windows 11 if you do not own a mouse or it has suddenly malfunctioned you can still move your arrow on-screen using the numeric pad. In this guide, we will guide you on how to turn this option ON, follow this easy guide step by step.

1. Press ⊞ WINDOWS + I to open Windows settings
2. Click on Accessibility on left
3. Scroll down to reach the interaction section on the right and click on Mouse
4. Click on Switch beside Mouse keys under accessibility options
5. Set your preferences
6. Close settings

Settings will be as always automatically applied.

In case you don’t know, there is a feature in Windows 10 computers that allows them to function a lot better. This feature is called Full-Screen optimization and it is enabled by default for several applications such as games and video players. If enabled, the Full-Screen optimization feature enhances the video playback and gaming by simply putting the CPU and GPU process as a priority. However, there are times when it can also result to a drop in the frame rate or FPS while in full-screen mode. And of course, the obvious solution to this dilemma is by disabling the Full-Screen optimization feature which is why Microsoft took action and removed this feature themselves in the recent Windows 10 Update releases. However, there is another way for you to enable it back or disable it yourself if you haven’t installed the recent updates yet and there are plenty of ways you can do both. All you have to do is follow the options given below carefully.

Option 1 – Try using Windows 10 Settings

If you haven’t installed the recent updates yet and all you have are the earlier releases, then this method would suit you.

• Open the Windows 10 Settings app.
• Next, navigate to System > Display > Graphics Settings or Advanced graphics settings.
• From there, uncheck the “Enable Fullscreen optimization” option if you want to disable the feature, else just keep it checked.

Option 2 – Try using the Registry Editor

• Tap the Win + R keys to open the Run dialog box and then type “Regedit” in the field and hit Enter to open the Registry Editor.
• Afterward, if a User Account Control or UAC prompt appears, click on Yes.
• Once the Registry Editor is pulled up, navigate to this registry key: HKEY_CURRENT_USERSystemGameConfigStore
• Next, right-click on Explorer and select New > DWORD (32-bit) Value and then name it to “GameDVR_DSEBehavior and tap Enter to save it.
• Now double click on the newly created GameDVR_DSEBehavior DWORD and set its value to “2” if you want to disable it, or “0” if you want to enable it.
• Once you entered the value, close the Registry Editor and restart your computer to successfully apply the changes made.

Option 3 – Try running the application in Compatibility Mode

If the first two options didn’t work, the next thing you can do is to run the application in a Compatibility Mode. Follow the steps below to do so:

• Go to the location of the application or game on which you need to disable or enable the Full-Screen optimization feature.
• After that, right-click on it and select Properties.
• Next, switch to the Compatibility tab where you can see the “Disable fullscreen optimization” option to disable the feature and vice versa.
• Now click on the Apply and OK buttons to apply the changes made in the application’s settings.

The new thing from Mozilla is not a browser, it is a VPN!

Besides Firefox, Mozilla offers now Firefox Relay, an app helping you to mask your email and phone number, and a new Mozilla VPN.

Mozilla has recently announced a new subscription model that will let you use all products together for $6.99 per month. Although this is a little more expensive than the competition that goes around for $5 per month note that with this subscription you are having access to all services, not just VPN.

VPN will not only hide your IP address but will also make sure websites cannot access your real location and it encrypts all of your network activity. Relay will give you protection against spam, serving as a shield for your email and limiting spammers from access to your real email address and phone number. With Mozilla subscription will let you use both services.

Being in the Microsoft Windows insider program will let you get a hands-on new Windows 11, but some people just want Windows 11 without being in the insider program. Well, people beware! It was detected that some groups have been releasing fake Windows 11 installers with malware into them. There’s one malicious file called 86307_windows 11 builds 21996.1 x64 + activator.exe. Based on the filename, one might guess that it includes Windows 11 build 21996.1, and on top of that, there’s something in it that will automatically activate Windows for you. It comes in at 1.75GB, so for some people, that might seem reasonable. It starts out looking like a normal installer, and then there’s a second installer that calls itself a download manager. If you accept the nonsense agreement that’s included, you get a bunch of malware. This is just one example of malicious installers running amok internet, but there are more of them with different software placed inside. Malware can be anything from adware to a Trojan virus. The adware usually isn’t super dangerous. It’s just malware that’s meant to inject your PC with advertisements. Viruses can be more of an issue, and they can be harder to get rid of if your machine is infected. Windows Defender does a good job of getting rid of this stuff. The only problem is that if you’re downloading Windows 11 from shady sources, you’re probably already set to click through the dozen or so warnings that pop up telling you not to install it. The solution will be to get Windows from a trusted source of roll inside the insider program and get it from Microsoft directly.

What is Windows ImageAcquisition High CPU & Disk usage? The Windows Image Acquisition is the driver model in charge of the communication between the graphics hardware and the operating system. There are times when it causes high disk and CPU usage in Windows 10 systems which results in slow performance of the computer. To fix this issue, read on as this post will help you in addressing the problem. The cause of this problem might have something to do with the hardware or the drivers. And so if your computer becomes slow because of the Windows Image Acquisition process, here are some suggestions that might be of help. You can try to restart the Windows Image Acquisition service, run a System File Checker Scan, disconnect & reconnect imaging hardware as well as update and reinstall the drivers and updating the graphics drivers. For a complete set of instructions, follow the given options below.

Option 1 – Try restarting the Windows Image Acquisition Service

• Tap the Win + R keys to open the Run dialog box.
• Then type “services.msc” in the field and hit Enter to open the Windows Services Manager.
• From there, look for the Windows Image Acquisition Service and check on its service Status.
• If the Service Status is blank, right-click on it and select Start. And if the service Status is Running right-click on it and select Restart. After that, check if your computer’s performance is now back to normal.

Option 2 – Try running a System File Checker scan

As you know, running a System File Checker scan can help in replacing missing files as well as repair the corrupted ones which might be the reason behind the problem.

• Tap Win + R to launch Run.
• Type in cmd in the field and tap Enter.
• After opening Command Prompt, type in sfc /scannow

The command will start a system scan which will take a few whiles before it finishes. Once it’s done, you could get the following results:

1. Windows Resource Protection did not find any integrity violations.
2. Windows Resource Protection found corrupt files and successfully repaired them.
3. Windows Resource Protection found corrupt files but was unable to fix some of them.

• Restart your computer after the scan is completed.

Option 3 – Try disconnecting and reconnecting the imaging hardware and then update and reinstall its drivers

It could be that the hardware that calls for the Windows Image Acquisition service has some issues which are why disconnecting and reconnecting the imaging hardware like scanners, printers, cameras can help in fixing the problem. In addition, you can also boot your computer in a Clean Boot State so that you can find the problematic hardware by hit and trial method. Refer to the steps below to do so:

• Log onto your PC as an administrator.
• Type in MSConfig in the Start Search to open the System Configuration utility.
• From there, go to the General tab and click “Selective startup”.
• Clear the “Load Startup items” check box and make sure that the “Load System Services” and “Use Original boot configuration” options are checked.
• Next, click the Services tab and select the “Hide All Microsoft Services” check box.
• Click Disable all.
• Click on Apply/OK and restart your PC. (This will put your PC into a Clean Boot State. And configure Windows to use the usual startup, just simply undo the changes.)

Option 4 – Try updating the Graphics drivers

• First, boot your computer into Safe Mode.
• After that, tap the Win + R keys to launch Run.
• Type in devmgmt.msc into the box and tap Enter or click OK to open the Device Manager.
• After that, a list of device drivers will be displayed. From there, look for the Display Adapters and click on them.
• After that, right-click on each entry under the Display Adapters and select the “Uninstall Device” option from the menu.
• Now restart your computer.
• After restarting your computer, go to the Settings app and Check for Updates in the Windows Update section.

Note: You also have the option to go directly to the website of your graphics card manufacturers like NVIDIA, Intel, or AMD and go to the section called Drivers then check if there’s a new available update – if there is, download and install it.

We have gathered and want to share with you all of the Windows 11 wallpapers if you would like to place them on your desktop now and now wait for the official W11 release. Hope that you will like some of them and I hope to see you again on errortools.com Download Windows 11 Wallpapers here!

And here is the preview of them

What is Regsvr32 Error? - What Is It?

Regsvr32 is basically a command-line utility.

This command is used to register and unregister OLE controls for example the digital link library files and ActiveX controls in the Windows Registry. This command appears as the Regsvr32.exe file and is installed in the Microsoft Windows system file in the %systemroot%System32 folder.

The Regsvr32 command loads the library and tries to call the DllRegister Server and DllUnregister Server. In other words, it helps to register COM-based digital link library files to run different programs on your PC.

However, when the Regsvr32.exe file gets corrupt, you get the Regsvr32 to troubleshoot the error message on your computer screen. It can be displayed in various ways including the following:

“To register a module, you must provide a binary name.”

Error Causes

Generally, Regsvr32.exe becomes corrupt because either the load library, DllRegister Server or DllUnregister Server function fails. This indicates that the dll specified path was missing, incorrect, or couldn’t be found.

Here’s how the error messages are often displayed while registering a dll using Regsvr32.exe:

• “The command-flag "%1" is not valid. Please review the command usage and try again.”

If this error message is displayed, it typically means that you entered an invalid combination of command-line arguments or switches when calling upon the Regsvr32.exe application.

• “To register a module, you must provide a binary name.”

The cause of this error message is that you called the Regsvr32.exe function with no modules to register located in the command line arguments.

• “The module "%1" failed to load.nn Make sure the binary is stored at the specified path or debug it to check for problems with the binary or dependent .DLL files.nn%2.”

This Regsvr32 error message indicates that Windows had problems with loading the modules that you have identified in the command line.

Further Information and Manual Repair

Here are 2 recommended solutions to fix the Regsvr32 error on your PC:

1. Re-run the command

   You must re-run the Regsvr32 command from an elevated command prompt. For this, go to the start menu and type Command Prompt in the search box.

   Now right-click the Command Prompt and click the option that says Run as Administrator to run the command on your PC. If it prompts you to enter an administrator password, type the password and then click Allow to run the command.

2. Register a 32-bit Dll using a 32-bit version of Regsvr32 on a 64-bit version of Windows

   This may sound tricky but it is even simpler than the first solution discussed above. To register a 32-bit DLL using a 32-bit version of Regsvr32 on a 64-bit version of Windows, open an elevated command prompt.

   After it’s opened, if you see the 32-bit DLL is located in the following path: %systemroot%System32 folder, move it to %systemroot%SysWoW64 folder. Once you change paths, run this command: %systemroot%SysWoW64regsvr32 <full path of the DLL>

Try following these 2 recommended solutions to immediately fix and repair this error on your computer.

The solutions should eliminate the occurrence of error messages such as “To register a module, you must provide a binary name.” It is so easy and effective and you can do it on your own without calling over a professional.

Congratulations, you have just fixed the Regsvr32 Error in Windows 10 all by yourself. If you would like to read more helpful articles and tips about various software and hardware visit errortools.com daily. Now that’s how you fix Regsvr32 Error in Windows 10 on a computer. On the other hand, if your computer is going through some system-related issues that have to get fixed, there is a one-click solution known as Restoro you could check out to resolve them. This program is a useful tool that could repair corrupted registries and optimize your PC’s overall performance. Aside from that, it also cleans out your computer for any junk or corrupted files that help you eliminate any unwanted files from your system. This is basically a solution that’s within your grasp with just a click. It’s easy to use as it is user-friendly. For a complete set of instructions in downloading and using it, refer to the steps below Perform a full system scan using Restoro. To do so, follow the instructions below.

1. 1. 1. Download and install Restoro from the official site.
      2. Once the installation process is completed, run Restoro to perform a full system scan.
      3. After the scan is completed click the “Start Repair” button.

A surprisingly large amount of things present at your home can and do interfere with your wi-fi signal making it weak so devices are dropping it, having trouble connecting, or being slow.

Hello and welcome to our latest article where we will take a look at all things that are present in a lot of homes but are very bad for your WI-Fi signal.

Bad router placement

Having a router in a bad position can have some really large effects on WI-Fi signal strength and its availability. Usually, we do not give great attention to where we are placing our router but it has been proved over and over again that being close to certain objects does indeed have a great influence on the wireless signal strength and performance.

So, what are these objects and bad positions where we could place the router and effectively kill his Wi-Fi capabilities?

Fish Tanks

Water will block all radio waves including Wi-FI signals and waves themselves, so having a router next to the aquarium or any large source of water is a bad idea. You should always look at water as something bad for your Wi-Fi and move your router away from it as far as possible.

Bookshelves

Paper is another story and example of the dampening effect on radio waves. Did you know that various patterns of paper are used in silent rooms and recording studios in order to eliminate sound reflection from surfaces? Well besides absorbing sound waves, the paper also absorbs Wi-Fi signals and if you have a large bookshelf with a lot of books packed one beside another you just have a great wall of signal absorbing.

Mirrors

The problem with mirrors is in their coating that goes over the glass in order to turn it into the mirror, that coating is metal and as such, it is absorbing signals in large amounts. If you have an old or high-quality mirror that has a silver coating things are even worse since silver will absorb even more waves than modern cheap ones.

TV

Yup, TV is also on this list and for a similar reason as a mirror, although TV does not have coatings of metal, they have something even worse: a large metal plating on the back. Metal plating is there to produce structural integrity of the TV set and provide it with shielding from electromagnetic waves and as such it will prevent Wi-Fi waves as well. Do not place the router behind your TV.

Things that influence signals in homes

Any kind of metal decoration

Now when we covered mirrors and TV because of the metal they have, we must take a look at the metal itself. Any kind of metal stuff that you might have like baskets, figures, statues, frames, etc will effectively block your signal.

Kitchen appliances and Home utilities

Kitchen appliances like refrigerators, microwaves, ovens, stoves, etc. along with home appliances and utilities like dishwashers, washing machines, dryers, etc are large metal objects enclosed in a metal cage that will block signals from spreading further and it is no secret that most kitchens have weaker Wi-Fi because of this reason.

Home gyms

This is a logical conclusion as to everything explained so far if you have a workout room or small gym at home it is probably filled with weights that are metal and have mirrors inside, all of that will interfere and block signals.

Things blocking your Wi-Fi that you have no easy control over

Walls

Thick walls will dampen signals, thick walls from bricks will dampen even more and concrete walls will kill it almost completely. Any kind of metal reinforcement wiring inside walls will reduce and kill signals as well.

Floors and ceiling

This is somewhat important if you have a floor beneath or under the room where is your router located, but for the same reason how walls are blocking your signal floor and ceiling can do it as well, especially since most of the time they are made of some stronger material like concrete with metal fence inside.

Heating systems

If you have a heating system that is composed of metal radiators with water inside, then in terms of Wi-Fi signal strength you have an aquarium but in a metal box, and as such it will greatly reduce signal strength.