can't open some google sites after trojan infection

Hi,

I was sick so I wanted to download red alert 2 for keeping me busy. BAM, hit by a trojan from a torrent site, my fault.

Malwarebytes immediately discovered the threat, but seemed not to remove it all. When opening firefox again (Win10 operating system), a weird system setup box appeared that I closed in task manager. I did a windows defender search and that program found again the trojan and removed it, but had the same effect: none.

I did a start up in safe mode and I ran ADWCleaner, MBAM, Superantispyware and the online virus software ESET (which found 4 threats).

So far it seams to me that the trojan and other corrupted files are gone, but something went wrong with the certificates and I can't seem to find online how I can do something about it.

So far, it seems that only google-related sites don't work. I can open gmail though. But google.com gives me the error code SEC_ERROR_UNKNOWN_ISSUER.

The mozilla helpguide is getting me nowhere. Can someone explain what happened and what I can do about it?

Looks like hitman pro gave the trojan horse the final shot. Youtube and google are working properly now. It wasn't completely gone, since I had some pop-up blockings for ssp.zryydi stuff.

Are there any steps that I should take from here on? Is it necessary to take a new password for several sites?

Edited by McMudface, 06 January 2017 - 01:08 PM.