Guy, Please help me solve this problem of mine, I bought original WindowsXp after using for a year now, I boot up with windows Xp then it suddenly ask for a password, which before it didn't ask for. I think this is the work of a virus. Anybody encountered this? how to solve this one? I've seen some solution like ophcrack but the problem with my computer is, this wont boot up though USB. Hope there is another solution aside from formating. thanks in advance.