A couple of days ago I got the Internet Security virus. Norton Security detected it but that's all it did. I tried to follow the cleaning guide suggested here but I was only able to download the TFC to remove temporary files. When it prompted me to reboot I clicled yes, but after rebooting it only gets to the Welcome screen. If I click on any user, it looks like it is going to open but it immediately logs off again. Then I tried to reinstall Windows XP to repair it. The installation process was going pretty good but it has not moved from a black screen that shows the Windows logo with a sign that reads "Please wait", the problem is that it has not moved from there in almost 24 hours. It is not frozen as I can move the sand clock cursor. Please advice.