CPU 100% usage !!!

[Bandolero]

Hello guys. I need your help. In the last few days my CPU started to work at 100% usage First I've opened task manager to see working processes. Everything was fine, everyday processes were running, but the usage was on 100%. I've scanned my CPU with my Norton Internet Security 2012, no viruses. I did the same thing with Spybot Search and Destroy and with Malwarebytes Anti Malware, but they didn't find anything. I did all scans again in safe mode, but the problem still exsist. I only have to mention that in the safe mode my processor usage was normal. This is my problem guys. I want to leave system reset for last, if you know some solution, please help.

 

[EarthDog]

What process using the CPU... you were in the right spot to check..

 

[Luke1978]

Go into resource monitor if using Windows 7, it under the performance tab. Not sure about Win8

 

[Bandolero]

I've opened the resource monitor, I've found out that the exe file that was using my CPU was called "minerd.exe*32". I looked it up on the internet and found that it is a malware, but when I scanned my pc with Malwarebytes Anti Malware, I didnt found him. I've end his process tree, but how can I remove it for good?

 

[mimart7]

If you are not running Win 8, you can run Comboxfix, get it from here, http://www.bleepingcomputer.com/download/combofix/, the tutorial is here, http://www.bleepingcomputer.com/combofix/how-to-use-combofix. I'd also use Rkill,http://www.bleepingcomputer.com/download/rkill/, and Tdsskiller, https://support.kaspersky.com/viruses/disinfection/5350. All are free.

 

[Luke1978]

Bandolero, have you tried mining cryptocurrency? Or someone in the house perhaps?

 

[Silver_Pharaoh]

I've opened the resource monitor, I've found out that the exe file that was using my CPU was called "minerd.exe*32". I looked it up on the internet and found that it is a malware, but when I scanned my pc with Malwarebytes Anti Malware, I didnt found him. I've end his process tree, but how can I remove it for good?

Minerd.exe is a CPU mining program. Used to mine crypto-currencies. I use it myself time to time.

Like Luke asked, have you "mined" before?