While booting up, and while running programs, when I open ANY program (or the programs that run during startup) I get this message:[program name.exe]-Bad ImageThe application or DLL C:\Windows\system32\tadeliho.dll is not a valid Windows image. Please check this against your installation diskette. Then there's an OK button. When I click on the OK, the program runs and there doesn't seem to be any problems with the programs themselves. This happened when I tried to open games like Spider Solitaire or Minesweeper, when I opened IExplorer, or any other application.What does this mean????? And should I be worried?2 people need an answerI do too

That is a malware file and your computer is infected. To clean it up: http://www.elephantboycomputers.com/page2.html#Removing_MalwareMS-MVP - Elephant Boy Computers - Don't Panic!

I've just encountered this problem after a windows update, my antivirus found nothing but I found that the update didn't update right. After a while I couldn't figure out what to do so I restored from the update and my computer was fine.