How to hide taskbar inside Windows 11

intelppm.sys blue screen of death is linked to an outdated driver, if you received this error do not sweat we have simple solutions for you. Please keep on reading in order to find out what can you do to fix this error.

1. Update driver Go to the device manager and manually update old-dated drivers. Note that this will take some time because you will need to update each device manually through the device manager but in the end, it will fix the issue.
2. Use automated application Instead of going through each device one by one manually get a dedicated driver fixing device like DRIVERFIX and update all drivers automatically.

If you encounter Error Code 0x80090016 while trying to create a PIN or when you are using Microsoft Store, then you’ve come to the right place as this post will guide you in how you can fix this problem. Recently some users reported that they were unable to sign in or set up the Windows 10 Login PIN. Note that the potential fixes for this issue are totally different in both scenarios. Here’s the error message you get when you encounter the PIN related error:

“Something went wrong, We weren’t able to set up your PIN. Sometimes it helps to try again or you can skip for now and do this later.”

On the other hand, here’s the error message you get for the Microsoft Store-related error:

“Try that again, Something happened on our end and we couldn’t sign you in.”

Here are some potential fixes you can try to fix the Error Code 0x80090016 in the Microsoft Store:

Option 1 – Try to sync the Date and Time

The first thing you can try is to sync the Date and Time of your computer as the wrong Date and Time settings are one of the most common causes of connection problems like the Error Code 0x80090016. This is because of the incompatibility between the SSL Certificate validation date and the System Clock. Thus, you have to sync your System Clock. Refer to the steps below to do so.

• Start by tapping the Win + I keys to open the Windows Settings.
• Next, go to Time & Language > Date & time.
• From there, turn the toggle on for the “Set time automatically and Set time zone automatically” option on the right-side panel.
• After that, click on Region & language located on the left side panel and make sure that the Country or region on the right-side panel is set to the country you live in.
• Now close the Settings app and restart your computer and see if it fixes the problem or not.

Option 2 – Try to re-register the Microsoft Store app via PowerShell

• Tap the Win + X key combination or right-click on the Start button and click on the Windows PowerShell (Admin) option.
• If a User Account Control or UAC prompt appears, just click on Yes to proceed and open the Windows PowerShell window.
• Next, type in or copy-paste the following command to re-register the Microsoft Store app and tap Enter:

powershell -ExecutionPolicy Unrestricted Add-AppxPackage -DisableDevelopmentMode -Register $Env:SystemRootWinStoreAppxManifest.xml

• Wait for the process to be completed and then restart your computer.

Option 3 – Try to reset the Microsoft Store cache

Just like browsers, Microsoft Store also caches as you view apps and games so it is most likely that the cache is no longer valid and must be removed. To do so, follow the steps below.

• Right-click on the start button and click on Command Prompt (administrator).
• Next, type in the command, “exe” and tap Enter. Once you do, the command will clear the cache for the Windows Store app.
• Now restart your PC and afterward, try opening Microsoft Store again and then see if Error Code 0x80090016 is resolved or not.

Option 4 – Try to run the Windows Store Troubleshooter

The Windows 10 Store Apps Troubleshooter will help you in fixing the Error Code 0x80090016. This is a great built-in tool from Microsoft that helps users fix any app installation issues. So this is worth a try to solve the problem. This built-in tool also helps you fix the Windows 10 Store if it isn’t working. To use the Windows Store Troubleshooter, follow the steps below.

• Tap Win + I keys again to open the Windows Settings panel.
• Go to Update & Security and then go to Troubleshoot.
• On your right-hand side, scroll down to find the Windows Store Apps and then click on Run the troubleshooter option and see if it fixes the problem.

On the other hand, you can use the options below if you encounter Error Code 0x80090016 while setting up your PIN.

Option 5 – Try to manage the NGC Folder

• You need to boot your computer into Safe Mode first.
• Next, delete all the contents of the NGC folder and you can do that by taking ownership of the folder first. To do so, refer to these sub-steps:
  • First, locate the concerned folder and right-click on it then select Properties.
  • Next, click on the Edit button in the Properties window and click OK to confirm if you got a User Account Control elevation request.
  • After that, select user/group from the permission windows or click on the Add button to add another user or group. It would be best if you add “Everyone” to give permission.
  • Then check “Full Control” under the “Allow” column to assign full access rights control permissions.
  • Now edit the permission to Full Control for “Everyone”.
  • Click OK to save the changes made and then exit.
• After you take ownership of the folder, you can now delete all of its contents.
• Once you’re done, restart your computer and see if the problem is fixed.

Option 6 – Try to use the Group Policy Editor

• Tap the Win + R keys to open the Run dialog box
• Then type “gpedit.msc” in the field and hit Enter or click OK to open the Group Policy Editor.
• Next, navigate to this setting: Computer Configuration > Administrative Templates > System > Logon
• After that, double click on “Turn on convenience PIN Sign-in” and set its radio button to Enable. This policy setting has the following description:

“This policy setting allows you to control whether a domain user can sign in using a convenience PIN. If you enable this policy setting, a domain user can set up and sign in with a convenience PIN. If you disable or don’t configure this policy setting, a domain user can’t set up and use a convenience PIN. Note: The user’s domain password will be cached in the system vault when using this feature. To configure Windows Hello for Business, use the Administrative Template policies under Windows Hello for Business.”

• After you set the radio button to Enable, it will turn on the Logins using the PIN. Note that setting the radio button to Disabled or Not Configured will turn off the Logins using the PIN.
• Now exit the Group Policy Editor and restart your PC so that the changes can take effect.

Today we will be solving the Device not found 3F0 error which is a common error, especially among HP (HP Pavilion G6), Lenovo, Acer, and Dell laptops/desktops. This error occurs when the computer is turned ON and when the system is about to boot. It can happen on windows 7,  8, or 10. When a mentioned error occurs one of the following messages will be displayed on your screen:

• “No bootable device – insert boot disk and press any key”
• “No Boot Device Found. Press any key to reboot the machine”
• “Boot Device Not Found. Please install an operating system on your hard disk. Hard Disk (3FO)”
• “No boot device is available”

The most common reasons for 3F0 error to occur is:

• Using the unbootable device or disk to boot from.
• If the bootable hard drive you are using might have corrupted or damaged somehow.
• MBR or boot sector is damaged on the bootable hard drive.
• If your system has gone through a virus or malware attack.
• The wrong boot order in the BIOS.
• Hard disk connection problem.
• System files or boot files unknowingly damaged.
• Corrupt hard drive partitions.

This is well, the most simple solution and the easiest one, try to change the boot sequence in the BIOS settings of your motherboard. Sometimes most easier solutions can provide great results and solve our problems. If sadly this fails and the issue persists move to the next solution.

2: Perform a Hard Reset

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Performing hard reset can often solve issues, to perform a hard reset do the following:

• Turn off the computer and unplug the power adapter. If there is a removable battery, it should also be removed.
• Then disconnect all peripherals, including the removable hard drive, etc.

then

• Press and hold the power button for 15 seconds to drain all remaining power.
• Insert the battery, and then re-plug the AC adapter into the laptop.
• Press the power button to turn on the computer.
• Once the computer starts up properly and the startup menu appears, use the arrow keys to select “Start Windows normally” and then press Enter.

Reconnect everything back of your peripherals. If by any chance problem still persists follow the next step:

3: Test Hard Drive Using HP Diagnostic Tool

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Use the built-in tool in the Hp device to solve the issue:

• Turn on your computer and keep pressing the Esc key until the menu appears on the screen.
• Next, press the F2 key.
• Choose the Components Tests option from the HP PC Hardware Diagnostics menu.
• Select Hard Drive from the Component Tests menu.
• Click on the Quick Test, then click on the Run once button.
• If there are still any issues with your hard drive, then run the Extensive Test.

4: Restore BIOS Default Settings

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• Press the Power button to start the computer, and immediately after this, repeatedly press the F10 key to enter the BIOS setup menu.
• To load and restore BIOS Setup Default settings, press F9 on the BIOS setup menu.
• Once loaded, press F10 to Save and Exit.
• Select yes, and then press Enter when it says Exit Saving Changes.

5: Reconnect Your Hard Drive

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• Turn the computer off and remove the power cable.
• If you have a removable battery, take it out
• Disconnect your hard drive and then connect it back.
• Reassemble your computer and turn the computer on to see if it fixed the issue.

6: Fix and Rebuild Damaged MBR

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• Boot from the original installation DVD (or the recovery USB)
• At the Welcome screen, click Repair your computer.
• Choose Troubleshoot.
• Choose Command Prompt.
• When the Command Prompt loads, type the following commands: bootrec /FixMbr bootrec /FixBoot bootrec /ScanOs bootrec /RebuildBcd.

7: Fix Operating System

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• Prepare a Windows installation disc, CD/DVD or USB flash drive and connect it to your PC.
• During the installation process, launch Command Prompt.
• In Windows 7, under the System Recovery Options tab, click Startup Repair.
• In Windows 8 and Windows 10, click Repair your computer, then select Troubleshoot > Advanced options > Automatic Repair (Windows 8) or Startup Repair (Windows 10).

8: Replace the Hard Disk

If you suddenly noticed that your Onscreen keyboard in Windows 10 has become completely white or transparent for some reason, then you’ve come to the right place as this post will guide you on what you can do to resolve this kind of issue in your computer. As you know, the on-screen keyboard is included in Windows 10 and has an executable file named “osk.exe”. The on-screen keyboard is a part of the Ease of Access feature in Windows 10 which allows users to navigate the computer with the help of the mouse instead of the physical keyboard. However, there are times when you might encounter some issues when using the on-screen keyboard. One of the issues reported recently is that the on-screen keyboard becomes transparent or it only displays the borders but there is no way for you to access it. You also won’t be able to move it from the view completely. To fix this problem, there are several suggestions you can check out. You can try to check the Fade button or run the Windows Touch Keyboard troubleshooter. You can also restart its process in the Task Manager. For more details, refer to each one of the given options below.

Option 1 – Try to check the Fade button

The first thing you can do is to check the Fade button on the on-screen keyboard. You can find it at the bottom right corner of the keyboard. If it is enabled, then it’s probably the reason why your on-screen keyboard is transparent as it lets it fade in the background. Thus, you have to disable it to resolve the problem.

Option 2 – Try to run the Windows Touch Keyboard troubleshooter

The next option you can check out is running the Windows Touch Keyboard troubleshooter. This troubleshooter will help you identify the problem and would fix them automatically.

Option 3 – Try to restart the process of the on-screen keyboard via Task Manager

The next thing you can do is to restart the on-screen keyboard’s process in the Task Manager. Just follow the steps below.

• First, tap the Ctrl + Shift + Esc keys to open the Task Manager.
• Next, go to the Processes tab and look for the option that says, “Accessibility On-screen Keyboard”.
• Once you found it, click on the drop-down arrow next to it and right click on the “On-screen Keyboard” option, and select End task to end its process.
• After that, tap the Win + R keys to launch the Run utility and type “osk.exe” in the field, and then hit Enter to open the on-screen keyboard.

If when trying to start Autodesk applications you receive a Network license not available error then please keep on reading, this guide is for you:

The Event Viewer in the Windows operating system is used to troubleshoot any computer issues. It is one of the most useful tools that keep logs of both security and system events. It also monitors for both software and hardware problems in the computer. This tool is the only one with amazing features that maintain logs about everything that’s going on in the computer system. It keeps track of all the information to the point where going over them will take a lot of time. Luckily, the Event Viewer tool now allows users to create custom views where you can set the filters and sort the data recorded to limit the information details to only what you’re interested in seeing. For instance, if you want to troubleshoot with one hard drive, you can just create a special custom view to display only the hard drive warnings in the security logs. This will save you hassle and time. Take note that the logs in the Event Viewer are divided into two main categories namely the Window logs and the Application and Services logs. You can just set the filter to the logs by their event id, specific date, and many other events when you have to troubleshoot some problem in your computer. So if you are trying to troubleshoot a problem in your Windows 10 computer and you’re checking the Event Viewer, read on as this post will guide you in creating custom event views in the Event Viewer. To get started, refer to the instructions given below. Step 1: Go to the Start menu and in the search box, type “event viewer” and then click on Event Viewer from the search results to open it. Step 2: After opening Event Viewer, click on Custom Views located in the left pane of the window. Step 3: Next, click on the Administrative events under the Custom View to create special log views. Step 4: Then on the right side of the window, click on Create Custom View to open the Create Custom View window. Step 5: There is a logged drop-down list under Filter. From there, you have the option to choose an appropriate predefined time or use a custom time range for your Custom log views. Step 6: After that, select an appropriate event level for your custom view. You have fine entry-level options to choose from such as critical event level, error, warning, information and verbose.

• Critical – select this if you want to see the events that require your immediate attention in the custom view.
• Error – select this if you want your Event Viewer to display the events that are less critical but hints at the problems.
• Warning – select this event-level if you want to see the event with the potential problem but may not bound to happen.
• Verbose – select this if you want to see detailed information about all the events.

Step 7: After you’ve selected the event level, you now have to select how you want the events to be filtered. They can either be filtered By the log or By the source.

• By the log – you can select two options called Windows log and, Application and Service logs. The Windows logs allow you to filter the logs created during events like setup, security, applications, and system events. While the Application and Service logs filter the log created by the installed applications in your system.
• By the source – select this if you want your Custom View to search for information in event sources. It allows you to view events in detail for various applications and devices.

Note: You have the option to further customize the event logs with more filters like Event IDs, task category, keywords, User, and Computer. Using these additional filters, you can choose to filter the events in the special views by specifying event id numbers in the Event IDs, entering predefined Windows words in the Keyword, specify the user accounts in the User field, as well as choose the system from the server to maintain logs in the Computer field. Step 8: Once you’re done customizing the log filter, click on OK to apply the changes made. Step 9: After that, a Save Filter should be displayed in the Custom View window. Just enter the Custom View name and select the Event Viewer folder where you want to save the Custom view. The folder name should be Custom View by default. And if you want, you can also create your own folder if you want your custom views to be visible to all the system users. Step 10: Next, check all the Users box located in the lower corner of the window and then click the OK button after you’re done. You should now see the customized filter you just created on the left side of the window. Just click on it to check your filtered events in the center of the Event Viewer window. And for you to save the custom view logs, simply right-click on the Custom views you created and then click on Save All Events in the Custom View As from the drop-down menu. Then put a name on the file and select the appropriate location where you want to save the logs and click on the Save button. Note that the log file is saved with the “.EVTX” file extension and when you double click on it, it will open the file in the Event Viewer.

The issue with the abrupt system reboots to force Windows 10 updates on a computer has been lessened with Active Hours. This feature keeps a record of the hours during which a system remains active and prevents the installation of updates during such hours. For example, when a system restart is needed to complete the installation of an update, Active Hours delays the update and allows you to finish what you’re doing on your computer. Thus, if you haven’t heard of this feature, then now is the time you do, read this post to configure and use Active Hours in your Windows 10 computer. There are three ways you can configure Active Hours. The first one is for general users, whereas the rest of the two methods are for users who knows their way about the Windows Registry and Group Policy. To get started, refer to every given option below.

Option 1 – Configure Active Hours via Windows 10 Settings

• Go to Settings > Update & Security. From there, click on the “Change active hours” option under the Windows Update section.
• Next, you can select a time (“Start time” and “End time”) during which the restart can occur.
• After that, click on the Save button and exit.

Note: Keep in mind that the values you’ve entered indicate the hours during which your system is in use, namely, ACTIVE. It is important for your active hour’s interval period and it can be anything between 1 and 18 hours since you can’t go beyond 18 hours. In addition, there is no option to configure different active hours on different days and you can’t specify different active hours for weekends and weekdays as well. On the other hand, Windows 10 also offer users an option to override Active Hours. All you have to do is go to Settings > Update & Security > Windows Update > Restart Options. From there, you can choose a custom restart time when your computer will restart to install the updates but this is only a one-time setting.

Option 2 – Configure Active Hours via Registry Editor

• Tap the Win + R keys to open the Run utility and type “Regedit” in the field and tap Enter or click OK to open the Registry Editor.
• Next, navigate to this registry path: HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsUpdateUXSettings
• In the given registry path, you can choose to change “ActiveHoursStart” and “ActiveHoursEnd”.

Note: There are no extra settings available in the Registry Editor but you can change the remote computer’s Active hours settings using the Registry Editor.

Option 3 – Configure Active Hours via Group Policy

Note that this option is available for the Windows 10 Pro and Educational or Enterprise versions. It is mostly used by computers in Business or through remote access. To get started, follow these steps:

• Tap the Win + R keys to launch Run and type “gpedit.msc” in the field and tap Enter or click OK to open the Group Policy Editor.
• Next, navigate to this group policy setting: Local Computer Policy > Computer Configuration > Administrative Templates > Windows Components > Windows Updates.
• From there, look for a policy labeled “Turn off auto-restart for updates during active hours” and double click on it. This will open a new window.
• Click on the Enabled radio button to enable Active Hours. You also have the option to choose active hours just like in the first given option above. It works just fine except when the following policies don’t override:
  • No Auto-restart with logged-on users for scheduled automatic updates installations.
  • Always automatically restart at the scheduled time.

• Since Group Policy allows you to reduce the range of active hours, you can configure it if you want it to be less than 18 hours. Just find the policy setting labeled “Specify Active hours range for auto -restarts. The minimum is 8 hours”.
• After you set the Active Hours, click the Apply and OK buttons to save the changes made.

Internal Error 2324 - What is it?

Internal Error 2324 occurs when you try to upgrade Firefox on your Windows 7 PC. The program fails to install and run successfully. The following error message is displayed:

‘The installer encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2324.’

Solution

Error Causes

This error may occur due to different reasons. These include:

• Viral infection
• Bad registry entries (cookies or traces of old version of Firefox program)
• Other programs running on your PC during Firefox program installation
• Installation was not performed from the Administrator account

To use the Firefox web browser successfully on your PC, you first need to resolve error 2324 on your system.

Further Information and Manual Repair

To repair error 2324, try the following methods:

Method 1 - Perform a Clean Reinstall.

This means to remove the Firefox program completely from your PC and then reinstall it. To do this, remove the Firefox installation folder saved in one of the locations by default: C:\Program Files\Mozilla Firefox C:\Program Files (x86)\Mozilla Firefox Now download the latest Firefox version on your PC and save the setup file on your computer. After that double click, the downloaded installation file and follow the steps illustrated in the wizard to install Firefox on your PC.

Method 2

Sometimes Firefox installation may fail because of the interference from other programs running on your PC. Therefore, it is advisable to close all programs running in the background when upgrading the Firefox program. You can also disable programs like Logitech QuickCam and Spybot Tea Timer.  These are some of the many programs that are notorious for interfering with Firefox updates.

Method 3 - Scan for viruses to resolve.

Viruses are malicious programs that often enter computers through files downloads from unreliable websites and phishing emails. These programs then hide in your PC and infect it. You may often experience problems during program installation if your PC is infected by viruses. To fix the issue and ensure smooth Firefox program installation on your system, simply run an antivirus. Antivirus scans and detects all viruses in a few minutes. Upon detection, remove them right away to ensure your PC is free from such malicious programs. Now try updating Firefox on your system again. If it is updated smoothly, then the error is resolved.

Method 4

The registry of your system stores all the activities performed on your PC. You may have uninstalled the old Firefox version from the Control Panel but the traces of the uninstalled program may still remain in the registry as bad entries. These bad entries may be causing error 2324 to pop up on your PC. To resolve, you need to remove these entries from the registry. For quick removal, download Restoro. It is a user-friendly PC Fixer with a registry cleaner that scans and removes all obsolete files stored in the registry such as incorrect registry keys, bad entries, cookies, and junk files. Click here to download Restoro.

One of the biggest annoyances in Windows 10 is that it’s upgrading from one version to another. Although these upgrades are necessary to fix some bugs or improve user experience, some of them actually bring bugs into the computers instead. And in one of the recent Windows 10 updates, a lot of issues were found especially for users who use Remote Desktop on a daily basis. The error stacks up as Windows 10 Remote Desktop Protocol client is not working or won’t connect and can’t find the computer HOSTNAME generally. Based on the reports by users who experienced this issue, there are two cases around it:

1. Users who try to reach a specific website or folder on the network

Some users encounter this error when they try to run the Network Troubleshooter. Even when they add the server name inside it, it still won’t identify the problem, and unpredictably, the driver seems to appear and disappear every now and then. And even after connecting, the network commands don’t work at all. This is really troublesome for users who have lots of PCs and all the other systems do not appear on the network.

2. Remote Desktop isn’t able to find the computer HOSTNAME

Some other users reported that the error appeared when they use the classic remote desktop software. It keeps on failing and throwing the error message, “Remote Desktop can’t find the computer “HOSTNAME”. If this is the same scenario you are having, it means that “HOSTNAME” does not belong to the specified network. So you need to verify the computer name and domain where you are trying to connect to. There are times when it used to work after some users tried connecting to the domain a couple of times. However, when users try to use the UWP version of Remote Desktop, it seems to connect most of the time. This kind of problem is definitely a DNS issue. It could be that there are two different records on the DNS server which is why it connects and other times it doesn’t. When it is able to resolve the correct address, the drives connect to the PC however, after a couple of minutes, they will suddenly go missing. Using “nslookup” for the hostname, multiple times, you can check this and see if you’ll get identical results all the time.

nslookup [–SubCommand …] [{ComputerToFind| [–Server]}]

If you’ve determined that the drives disappear each time, you may have to change the DNS server or ask your admin to resolve the problem for you. Alternatively, you can also check out another option that has worked for a lot of users. This second option is disabling the IPv6 on the network adapter. In case you don’t know, Windows 10 prefers IPv6 over IPv4 so if you now have issues using IPv6 to connect to the servers, you can change your computer’s settings so that it’ll only use IPv4 instead of IPv6. To do so, follow these instructions:

• Open Settings > Network and Internet > Ethernet > Change Adapter options.
• From there, right-click on the adapter for where you want to disable it and then select Properties.
• Next, look for the checkbox labeled, “Internet Protocol Version 6 (TCP/IPv6)” then uncheck it.
• Now click on OK and restart your PC to save the changes made.

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.