Infected by unknown virus or adware or malware.

[argus]

Scan with ComboFix

This is a very powerful tool that should be used only if advised by Malware Analyst.
Do not run ComboFix on your own!

Referring to this instruction, please download ComboFix by sUBs and save it to your desktop.
Temporary disable your AntiVirus and AntiSpyware protection - instructions here.

• Right-click on
  
  icon and select
  
  Run as Administrator to start the tool.
• Accept the disclaimer and agree if prompted to install Recovery Console.
• Do not take any actions while ComboFix goes through your System - it may cause it to stall!
• This scan may take some time!
• When finished - it will display a logfile (located also on your main drive, usually C:\ComboFix.txt).

Include that log in your next reply.

If you'll encounter any issues with internet connection after running ComboFix, please visit this link.

If an error about operation on the key marked for deletion will appear after running the tool, please reboot your machine.

 

[bloomingskull]

I received some errors:
I disabled avira and antimalware bites as instructed (closed umbrella) but avira said it blocked an access to registry immediately after combo fix started his duty.
Anyway Combofix finished his work and then restarted windows, but then I received errors from windows as I tried to open ANY program. I even tried to save the error with a snapshot but I couldn't start it.

Also it didn't create combofix.txt log file in C:/ nor in desktop.

I restarted and now everything is back to normal, should I start combofix again, maybe not from desktop?

 

[argus]

Uninstal Avira and run Combofix.