Would you go to a doctor who'd lost his license to practice medicine?
Would you still deposit your hard-earned money in a bank that had gone under?
I don't think so...
The following applies to ALL of your threads:
You have been seeing the effects of an ongoing hijackware infection, most likely compounded by a W32/Alureon-variant rootkit infection (or worse). See...
• Cleaning a Compromised System
http://technet.microsoft.com/en-us/library/cc700813.aspx
Follow the instructions in this post of mine in another forum (to-the-letter &in order! ) to return your computer to a secure & functional state: http://aumha.net/viewtopic.php?f=62&t=44636
If you need additional assistance with the clean install, please begin a new thread in this forum: http://answers.microsoft.com/en-us/windows/forum/windows_xp-system
Note: The computer should not be connected to the internet or any local networks (i.e., other computers) in its current state. All of your personal data (e.g., online banking & credit-card passwords) should be considered at-risk, if not already compromised.
Wish I'd had better news for you. Good luck!