Virus or something else?

[Niruvius]

My browser (chrome) got replaced by browser named my browser that does not alow me to enter chrome / firefox, also my browsers (chrome and firefox) started to open webpages and go to random sites when i enter youtube (weird betting sites and some money earning sites) avast seems to ignore it.
Is there any free program that can solve that for me or only cure is to clean my discs and reinstal all things i have on my pc?

 

[johnnyb105]

Down load bitdefender for free scan your system and report back.

 

[MarkW]

Malwarebytes

 

[RealBeast]

I agree that Malwarebytes is a good first step.

If it is stubborn malware though, go to THIS guide with links to all the freeware you need. You can clean pretty much anything following the guide and using the freeware it links.

That site also has specific links for the more common malware types that tailor the guide to them.