Aero keeps being disabled

Hi,
For about the past 2 days my computer has been suddenly either booting without aero effects or just randomly disabling them about every hour or so. To temporarily fix this i run the troubleshooter and this is what appears:
View attachment 46840

Any ideas to why this has suddenly started happening? I have all the latest drivers and updates.
I've been to the service page after the troubleshooter has run but is says Desktop Windows Manager is running.

Any help would be appreciated
Thanks.

Hello,

I cannot say what is causing the problem, but because it only happened in the past few days, perhaps a System Restore will help.

Also, could it be a virus? Try downloading Malwarebytes free and doing a scan.

Hope this helps,
~Jonathan