CPU USAGE Super HIGH & Overheating .. Intel i3

[DigitalMind]

hey guys, my intel i3 is overheating.. And it's using a lot of CPU Usage, never had it before. I was just playing Dayz, and it ran fine.
Left my computer for an hour, went back online & It started giving me shit.
Everything i boot, like skype will boost my cpu up to a 100% ..

Anyone knows a solution, or anything else ? I was wondering if a Windows reset would help, & wipe my hdd's ..

Screenshot one ( Before booting skype as a example )
Screenshot two ( After booting skype )

If anyone could give me a tip, i would appreciate !
And YES, I have cleaned my case & used new cool paste.

[Anti]

Virus perhaps?

[dtm4]

I usually just boot Ubuntu from a flash drive to see if there is something software related that is causing problems, I suggest you do the same and go on from there.