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Why do programs keep uninstalling themselves from my computer?

Lately, every time I go to run any program, it prompts me to install it, as if it were not installed in the first place. This is all manner of programs, not just one particular one. I'm getting tired of re-entering CD key numbers for the same programs over and over. Anyone know what could be causing this?

I tried googling this, but I keep getting pages that tell me how to uninstall my files. :\ I use Windows XP.

Update:

Edit: nope, these aren't trials or cracks. 100% legit.

Update 2:

Programs: Adobe Photoshop CS2, iTunes, QuickTime, EA Download Manager, The Sims 3 and Microsoft Excel 2007.

Update 3:

Edit: registry cleaner? will give that a go. Thanks so much!

3 Answers

Relevance
  • Anonymous
    1 decade ago
    Favorite Answer

    it's registry errors.

    have you used a registry cleaner lately ?

    this occurs when you have many path's leading to dead end's in the registry,

    it's like a road with a bridge accross a river halfway down the road.

    you start off down the road but when you get to the bridge it's missing

    so you can't travel down the other half of the road.

    the same thing is happening in your registry.

    .

  • 1 decade ago

    is it trial?? or crack??

    or maybe u have viruses in ur computer.. so try to clean viruses and update ur anti-virus and tell me if the problem was solved or not :)

    good luck (K)

  • NoBozo
    Lv 6
    1 decade ago

    What program? More info is needed.

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