svchost can do that without showing the name of the process it's running. Drivers are usually signed, run dxdiag (start, run, type in dxdiag) and it'll tell you if all your drivers are digitally signed so doubtful it's a driver type virus.
Have you tried rolling back your system to a date before it started doing that?
you'll loose anything you installed after the restore date but mabe give that a try.
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