Until two weeks ago, I had not problems logging in using Administrator and my password. Now I can only use the guest account. My applications are not available. Why is my password broken? I am the only person who has used this computer since 2005.

Repost in this forum for assistance: http://social.answers.microsoft.com/Forums/en-US/xpsecurity/threadsNote: Support for WinXP SP2 ended on 13 July 2010. Computers running WinXP SP2 "will no longer receive software updates from Windows Update" [i.e., updates released on & after 02 August 2010 so you're now over three months behind!] until SP3 has been installed. Extended Support for WinXP SP3 will continue through 08 April 2014. • What does it mean if my version of Windows is no longer supported? http://windows.microsoft.com/en-us/windows/help/what-does-end-of-support-meanIf you do NOT have a valid & fully-functional anti-virus application installed, see... Cleaning a Compromised System http://technet.microsoft.com/en-us/library/cc700813.aspxFollow the instructions in this post of mine in another forum (to-the-letter & in order!) to return your computer to a secure state: http://aumha.net/viewtopic.php?f=62&t=44636If you need additional assistance with the clean install, please begin a new thread in this forum: http://social.answers.microsoft.com/Forums/en-US/xprepair/threads~Robear Dyer (PA Bear) ~ MS MVP (IE, Mail, Security, Windows & Update Services) since 2002 ~ Disclaimer: MS MVPs neither represent nor work for Microsoft