Pc Help AsAp

:cry Ok Guys & Grils. I left my pc on 1 day and my brother got on 2 it. From then iv been having problems. 1 he will not tell me what he was doing on it and 2.i have hiden programs running. Iv run windows onecare scan and it has found TrojanDownloader:ASX/Wimad.gen!A, it cant delete it, my A/V is norton and it cant pick it up but it did pick up some bloodhounds (what ever that is) and a hacktool. The program that is hiden is ProxyHunter V3.1. As iv said norton cant pick anything up and spybot is the same. All help is welcome cos its easy 2 restore my pc, but iv alot of stuff on it that means alot 2 me and it would be a shame 2 lose it all. Thanks in Adv Guys & Girls

 

People after readin Malware Removal FAQ when downloading SUPERAntiSpyware, SpyBot -Search & Destroy, Malwarebytes Anti-Malware all 3 downloads are comming up as rminstall.exe Registry Mechanic Setup and its askin 2 overwrite them when i click save. combofix.exe was ok and i saved the MGtools.exe 2 my C: folder. Iv got spybot on pc so if anyone can help with the other 2 downloads it would be welcome