That make me feel bad, especially at the beginning of a new year.
I think the reason is that the DNS records in the router of my place are changed by my house sharer's computer which is affected by some "click-hijacking" worm.
So, clicks on some links are redirected to some bad pages, and then "W32.Tidserv"(or named W32.Tidns) and resycled/boot.com(or named Trojan Horse SHeur.CODS) flood into the whole LAN. Consequently, all computers in my place get drunk and work weirdly, and sometimes reboot by themselves.
Although these problems are solved by full system scan using a antivirus program, time wasting (about 6 hrs) make me pissed, REALLY. =____=凸