Quality Compatibility Reg File to Make Windows 3rd Party
Anti-Virus Software Compatible with Windows 10 Updates
Use only if instructed to do so by an Anti-Virus Company.
---------------------------------------------------------
Reference: Meltdown and Spectre Windows patches
 [this file updated 01/09/18]

Check out the following to see if the AV company has patched their software:
https://docs.google.com/spreadsheets/u/1/d/184wcDt9I9TUNFFbsAVLpzAtckQxYiuirADzf3cL42FQ/htmlview?usp=sharing&sle=true

Save the 3 code lines between the horizontal lines as "qualcomp.reg":
----------------------------------------------------------------------------
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\QualityCompat]
"cadca5fe-87d3-4b96-b7fb-a231484277cc"=dword:00000000
----------------------------------------------------------------------------

The whole mess with anti-virus programs 
ref.: https://www.bleepingcomputer.com
---------------------------------------

"Microsoft says that during tests, it detected some anti-virus programs causing 
BSOD crashes that prevented computers from booting after the installation of 
the Meltdown and Spectre patches.

The company says it instructed anti-virus vendors to modify their products and 
create a registry key on customers' computers when they've confirmed or updated
their products so not to crash Windows PCs post-Meltdown/Spectre updates.

Microsoft says that currently, whenever users want to update Windows, its 
update system will check for that registry key on users' PCs.

If the key exists, the Windows update process will believe the anti-virus 
software received an update to support the Meltdown and Spectre patches, and 
install the proper OS updates as well.

This is where things get messy. Some AV companies have said they don't plan to 
create that registry key, some said they cannot "technically" create that key, 
while others will ship updates in the following days.

This Google Docs file contains a list of the responses from some AV companies.

In simple terms, most AV users will have to wait, as most AV companies have 
promised to update their products and automatically add the registry key.

The simplest way to go about this is if you can go to the Windows Update 
section every day and press the "Check for updates" button and you'll receive 
the update after your AV product creates that registry key."