Windows 7: messed up browser?!

Hi, my browser is (Firefox 11) searching only locally I can't get anything else plus the browser is in my local language which is quite annoying so ...how can I change that?
I know its a virus but my KIS Pure is not of much help, to think of how much I've paid for it!
I have formatted Windows 7 but the problem is getting worse.Please help!

Your message is not very clear. From what little I understand you think you are infected with a virus. Have you run an A-V for virus check? Which A-V is installed on your computer?

If Firefox is not working properly install either Chrome or Opera and see if they work properly.

It seems you have clean reinstalled W 7 after reformatting but you are still facing problems. Please confirm.

All in all please be more explicit and fill up your complete system specs as best as you can.

KIS pure is an A/V, if im not mistaken. I believe sandboxie would have saved him. Sandboxie is your friend

Actually I was trying to write as short message I could, which proved wrong...I'll correct that.I have fresh installed Windows 7 ultimate which is by now updated and KIS PURE 2.0 antivirus and firefox 11.
A month ago a friend visited me and showed me a picture of his fish tank on a local fish tank forum immediately My browser converted on my local language instead of my normal English setting that I usually use.Practically its a non English version of Firefox. I've formatted Windows 7 and I didn't have any problems until couple of days ago when my system crashed (BSOD) and Firefox started to act up again in the same manner.
I did all the scans possible but my Anitivir. program finds nothing(!) and the strange thing is that I've tried to set my network to HOME GROUP yet it stays PUBLIC and when I succeed in that then, I'm in some sort of JOINED home group and My network is named NETWORK 2.
Could it be that someone, somehow, has hacked in to my computer or something?
I did malwarebytes scan and this is what it found:

Try a good Rootkit Removing Software also. You may choose one from the list at 5 Best Free Rootkit Removers || Free Software.

Also please uninstall FireFox and adopt either Chrome or Opera as suggested earlier.

Are they compatible with KIS PURE 2.0?
BTW my Spyboot finished scanning and this is what it found:




Note that the OpaServ I found in previous installations and Spyboot can't erase it.How should I proceed?

Normally free Rootkit Removal Tools are compatible with the Anti-Virus in use. However if you want to be over-sure then before running the Rootkit Removal Software disconnect your computer from the Net and then turn off KIS PURE for the duration that the Rootkit Removal Tool is running.

Normally running of the Rootkit Removal Tool is not required on a continuous or daily basis.

I will but in the mean time can you tell me how to remove OpaServ thingy?

You can download the OpaServ Removal Tool from W32.Opaserv.Worm Removal Tool | Symantec to remove it.

Hope that you succeed.

Thanks for your fast answers You are most kind.I will do all this and soon inform you here.