I start my XP,in the first minute, the explorer.exe always 100%,after about 20 seconds it run normal;then I open a folder,it take 100% again,why?
my OS is:XP pro sp2
symantec AntiVirus v10
Thats exactly his point. You need to run the program so we can figure out whats wrong with your system. When you run HijackThis! it gives you a log that you can just C+P here and they will tell you pretty much exactly whats wrong...