While on Yahoo Instant Messenger I accepted a file from a friend (turned out to be a hacker!)..When I opened the file, a legit looking Windows error message with these words popped up, " This is not who you think it is..you have been f***ed..I own you now"...The file was titled 'screen+shot', as for the extension, all I recall is .sbi or .sbc..and I'm not even 100% postive, I deleted it!!... I wasn't able to open any programs from desktop/start..Only IE..When I right clicked a desktop program, the word 'OPEN'was missing! I ran Norton 2004, scanned for 3 hours, no virus detected!...Ran online Trend Macro, no virus detected! Isn't it weird that I was hacked yet 2 virus scans say no virus?! So I reinstalled the OS....enabled ZoneAlarm Firewall..ran SpyBot...disabled system restore and ran a virus cleaner from Avast (no virus it said!)..and loaded Nortons 2004 My question is, in doing all the above can I assume my comp. is TROUBLE-FREE and whatever the hacker sent me is GONE? If the answer is no, please, anyone, tell me what else to do and I will do it!! Thanks!

If you formatted and reinstalled, you should be fine (assuming you applyed all the security patches again). If you only reinstalled windows on top of itself, you are probably still infected (though the deleted windows files were replaced). Some Trojans will not show up in Virus scans. You should try a Trojan Scanner. There are several available at Wilders.org. Do not click on or open anything that is sent to you if you are not 100% sure of who it is from and what it is.

hi chris413, efabes is right, get yourself a free 30 day trial copy of an anti-virus that has a good trojan engine such as Hauri, or Kapersky Labs Pro, and also a free 30 trial of Trojan Hunter and scan your machine. also download a free registry monitor such as RegProt, a free process & port monitor from Sysinternals (process explorer& procmon) don't use Kaaza, ICQ, or any messenger service. this is usually where the Black Hats hang out. all the best, murve

Thank you efabes, you were right, I only reinstalled and the trojan was still there!!..Thank you murve for the advice on TrojanHunter, it caught my trojan, a password stealer one! What I decided to do was reformat (wipe out the hard drive) and reinstall the OS...added to this Nortons 2004, Zone Alarm firewall, and Trojan Hunter...will be getting RegPort and port monitor soon! I find myself obsessively doing the Quick Scan in Trojan Hunter now! And I noticed open ports on some sites! That scares me!..Should I be? Also since I reformated (wiped clean) my hard drive, does that mean the registry too? Is everything new on it now, including a new registry? I'm worried that maybe there is still some trojan on here...By wiping out a hard drive and reinstalling does that completly remove any virus/trojans?? I want to reinstall Yahoo Instant Messenger so I can stay in contact with my friends...I have now learned my lesson tho, never to accept/open anything sent to me!!! big time! Even tho I wiped out the hard drive, if I reinstall Yahoo Messenger, can I get the trojan again from reinstalling it? I just want to feel safe, (but extremely cautious) again on here!! Thanks to all who help/helped me, I couldn't do it without your help!!