Pretty sure I have some Virus, Avira and MB don't agree

[cloudropis]

I'm pretty sure I have some malware or virus in my PC: weird processes in my Task Manager (like TWO rundll32.exe, and when I click on any of them and select "Open process's path" it does absolutely nothing), a window showing files copying without me doing anything etc etc, but both Avira and MB say I'm safe.
Is there something I can try? Is there some kind of software that can check if active processes are legit or not? Anything?

 

[sam1275tom]

It's OK to have more than one rundll32, but you can try Kaspersky, that is the most powerful AV I have ever used.

 

[cloudropis]

Is there a free software though?

 

[sam1275tom]

Is there a free software though?

Kaspersky offers a 30 days full trail, that's enough for you to give your computer a full scan.
Many people says Bitdefender is a good free AV, but I've never used it...

 

[mdd1963]

Try sysinternal's (pretty much a subsidiary of Microsoft) 'process explorer'...., it will show the root locations of any/all assorted processes...

Comodo's autoruns (part of CCE package) acts pretty similarly.....

 

[mdd1963]

As for free active AV software....

The choices run almost from A to Z.....(From AVG to Zillya!)

After you choose an active AV, you can still run periodic 2nd/3rd opinion scans with any or all of 20-30 assorted products if you wish....

malwarebytes antimalware is one of the more popular scanner/removers, 2nd opinion scanners (the paid version has active component)