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Cannot Install/Uninstall programs

Discussion in 'Windows XP' started by P3Pilot4000, Jul 7, 2008.

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  1. P3Pilot4000

    P3Pilot4000 Thread Starter

    Jun 2, 2008
    I have a stand-alone WinXP Home Edition 5.1.2600 SP3 Build 2600 and Windows Installer 4.5.6001.22159. When I do anything requiring an install or uninstall it downloads and starts to install, but then I get message: "This installation package could not be opened. Verify that the package exists and that you can access it, or contact the application vendor to verify that this is a valid Windows Installer Package." I've tried several things, such as procedures in Microsoft Article ID: 555175, with no luck.
    I can't even install the Windows Installer Cleanup Utility, update Adobe Reader, remove an old Java, etc. Have no idea what I might have done to cause this. I do run McAfee, CCleaner, Registry Booster 2, AdAware, XP RepairPro, Winferno Registry Power Cleaner, Wise Disk & Registry Cleaners, but never had the problem in the past.

    I'd appreciate any suggestions. Thanks. Ron :confused:
  2. ~Candy~

    ~Candy~ Retired Administrator

    Jan 27, 2001
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