PC suddenly slow

[Vaux]

Hi guys need help with my pc it has suddenly gone slow in the games I play
I dont really play new games and instead play left 4 dead 2 and Skyrim 
Both games used to run max at 60 with no problems but have suddenly gone down to 30
When idle my pc is on 50% cpu usage and on games its 100%ish 

I also see that the vram usage is quite low

Both cpu and gpu were cleaned 2 months ago and were fine until yesterday

And help would be appreciated

PC SPECS
i5 4690k

z97 gaming 7

r9 270x

8gb ram

stock cooler

[NTDaws]

6 minutes ago, Vaux said:

Hi guys need help with my pc it has suddenly gone slow in the games I play
I dont really play new games and instead play left 4 dead 2 and Skyrim 
Both games used to run max at 60 with no problems but have suddenly gone down to 30
When idle my pc is on 50% cpu usage and on games its 100%ish 

I also see that the vram usage is quite low

Both cpu and gpu were cleaned 2 months ago and were fine until yesterday

And help would be appreciated

PC SPECS
i5 4690k

z97 gaming 7

r9 270x

8gb ram

stock cooler

Do a memory test and check for any memory errors.

[Thorimus]

50% on idle seems a bit much. Go into Task Manager -> processes and see if anything's using up all your CPU. Some antiviruses which run in the background can be very CPU-heavy, or it could be some useless piece of bloatware or malware. Download Malwarebytes and run a scan.

[jools]

could be any kind of program running in background even windows update , so as thorimus sez see whats using cpu. please note I ve had this happen and by the time I thought to check cpu usuage the update had loaded....

[Vaux]

Thanks guys for the help it was spotify and google drive that both caused about 2 million k in processes combined