BSOD Error code 0xc000021a help

[Nathan0918]

Recently my computer has been giving me this error and I have no idea why. It first happened a couple days ago and I was able to fix it by doing a restore on a point I had to a month ago. When I woke up today it game me the error again. Luckly I was able to restore from a backup this time.

Can someone tell me where the problem is or how to keep it away?

 

[bajgur]

try:
sfc /scannow

and a dump file would be helpful to pinpoint the problem.