Microsoft KB Archive/268800

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BUG: Windows Installer Must Have Original Source Files When You Apply a Patch

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Q268800

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The information in this article applies to:


 * Microsoft Windows Installer, versions 1.0, 1.1, 1.2

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SYMPTOMS
When you apply a patch for an existing program that was installed with the Windows Installer, you may be prompted for the source files from the original installation. You are prompted to provide the source files from the original disk even if they are not needed for the actual patch.

CAUSE
In most patching scenarios, the source will be necessary in order to reinstall necessary files. A patch uses the Windows Installer file versioning rules when deciding whether to reinstall a file contained in a feature that is being updated.

Being prompted for the source when no files are being reinstalled is due to a bug in the Windows Installer patching algorithm.

RESOLUTION
When you perform the original installation from a network drive, Windows Installer can locate the files needed. However, the network location must be available when you apply the patch so that the source files can be found. Also, if you performed the original installation from a CD-ROM and the disc is still available, insert the CD-ROM disc when prompted.

STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article.

Additional query words:

Keywords : kbAppSetup kbMSI _IK kbMSI100bug kbMSI110bug

Issue type : kbbug

Technology : kbWinISearch kbWinI100