Hi Puo,
Nice you have cleansed it, it was se.dll, and I was right, it was on your system. Keep a good check on your system. XP does this automatically, win 98 SE there you need sfc.exe, scan and later check the logs, and if you find new ones, look on the net if they should be there, scan with FileAlyzer or a Bintscan. If you are into the P2P stuff, which is lively dangerous because of the free scamware you also load down from there, use a program like Peer Guardian. It is free, it is good, and work on preventing `crap and malware`installs onto your OS. Be aware, for the good old English saying says `Curiosity killed the Cat, but on the other hand `he who has made all possible mistakes within a very small area of interest, he is a genuine EXPERT`. So you are entitled to learn from things you did not know.
Have a nice and virusfree day,
POLONUS