This is what happened. i am using a free version antivir anti-virus software. i was playing an mp3 using winamp while opening antivir. antivir always performs system tests before it opens. so, while doing the system tests it detected a worm, trojan (?) from the mp3 i was playing. it asked me to delete this thing and i did. without even rally reading what it is making me delete. i only know that i lost rundll32.exe coz my pc gave a pop-up message that tells me so. this message appears everytime i access control panel. so i downloaded one from meijin.org and my control panel worked. anyway, after that i tried playing my mp3 using winamp but it says, "can't find winamp.exe" i downloaded one. i think that i downloaded an older version for i get error message that says "a fault occured at ........" so i tried removing winamp then installed winamp lite. i was using winamp pro 5.0 then. after installing winamp lite, i still can't play any mp3s. my mp3 worked with real player though. winamp won't open also. i double click it and nothing happens. now, with my other problem. my windows media player 9 is not working. i checked and it has "wmplayer.exe". i can't open any video or audio files. be it .wmv or .mpg. i double-click on the vid file. windows media player opens but that's it. no sound or pic. and then when i press ctrl-alt-del it says not responding. same with real player. it can't play .mpg anymore. also says not responding after a while. i notice also that i can't use yahoo messenger anymore. it freezes whenever i enter a chat room but works ok when i just pm someone in my contacts list. it also says not responding after a while. also my limewire software won't open too. i double-click and nothing happens. i am saying because my dial-up dialer won't open at first too. but rundll32.exe solved the problem. pics, word documents are ok though. plus i often get the message "windows has become unstable" you know, the one you see when the screen becomes blue. and lastly i ran stinger by mccaffe;a worm/ trojan remover(i already did this and still have the problems i mentioned) and here is what it found: W32/Bagle.n virus. it says that it has reapired this though. thanks for reading and i really hope thet you help me. please!!!!! btw, all this happened only after i ran my anti-virus.