Windows 10: Problems with the Anti-Virus Scanner

Split from this thread.I Receantly Upgraded/Updated my Laptop from Windows 10 -to- Windows 11 because the system kept notifing me of Compatabillitie so I did, I had many various Issues the first 5/7 days with it, First - NO BACKGROUND/Desktop-Taskbar, No Desktop Icons, ~ although Luckily I managed to find an old suggestion on Microsofts' FORUMS a few nights ago, that fixed that -- BUT! the Main problem I am haveing Constantly is "ANTIVIRUS SCAN FAIL* when ever Trying to download anything, I've gone into Windows securty/Defender Program, I've attempted to ReSet the *INTERNET SECURITY ZONEING SE

:)

 

Anti Virus Problems

You should not be using more than one anti-vrus program on your computer. Read the
IMPORTANT NOTE about not using more than one anti-virus program in this

topic.

The inability to turn on Windows Defender 8/10 is typically the result of having a third-party anti-virus installed or failure to remove it properly (completely). Since Windows 8/10 Defender includes anti-virus protection, it is
disabled during the installation of another anti-virus program. If a trial anti-virus (i.e. McAfee, Norton, etc) came
preinstalled on your computer or you installed one, Windows Defender will be turned off (disabled). Windows Defender recognizes the install and automatically disables itself when other anti-virus products are used
to avoid conflicts. Windows Defender will remain disabled until that anti-virus software has been completely uninstalled. In some cases, you may need to download and run the anti-virus vendor's clean up tool to remove any remaining
remnants.

• Replacing your Anti-virus - List of Antivirus Uninstallers and Removal Tools
• Microsoft Wiki: List of anti-malware product removal tools by Stephen Boots,
  MVP

After removal of the third party anti-virus, Windows 8/10 Defender needs to be
activated if you choose to use it. When uninstalling the third-party anti-virus Defender should automatically turn itself on but sometimes you may receive a message indicating
your system has no protection...click here to turn on Windows Defender. If not, and Defender remains disabled, you will need to manually turn it on.

• How to turn Windows Defender On or Off in Windows 10
• How to turn Windows Defender On or Off in Windows 8

 

What is the best anti-virus scanner to use (free)?

Hello guys,

Please can you tell me what is the best free anti-virus scanner to use with Windows 10?

 

Anti Virus

Which Anti-Virus solution you want to use is depending on your own personal preferences but do run occasional additional scans with an on-demand Malware-scanner, see Supplementing
your Anti-Virus Program with Anti-Malware Tools .

I suggest to read:

Choosing an Anti-Virus Program

Best Practices for Safe Computing - Prevention of Malware Infection