I format my PC becase it had this search engine and I couldn't

>>359745
http://www.myantispyware.com/2016/12/22/how-to-remove-nova-rambler-ru-chrome-firefox-ie-edge/

I've just format my PC. it doesn't have any malisious software only microsoft apps.

>>359755
then try to change your sesarch engine to Google
if you can't, run Zemana, then Malwarebytes

>>359756
Why does it keep in my PC even after format?

>>359757
>router compromised
>BIOS compromised
>restore points survive format and are compromised
>format compromised
perhaps it wasn't a thorough format
>other drives compromised
you formatted and reinstalled just for this? Malwarebytes would have no problem disinfecting your computer

you must download avast and this will clean your pc

If it persisted after a full reinstall, it's not on your PC. Nothing stays on the drive after a full reinstall. something else is infected. Try, if you can, reformat again, and never connected the PC to your local internet, connect it to data or whatever, and see if it persists then, if it doesn't, I would say that your router is comprised or another machine on your network is comprised and it's getting infected via the windows share option.

A more simple thing you can quickly try is to you chromes own cleanup tool, it's worth a try: https://www.google.com/chrome/cleanup-tool/index.html

>>359745
You're probably downloading a browser with that already built into it or added on during installation