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Error 1635 occurs when you try to install a Windows Installer patch

When you try to install a Microsoft Windows Installer patch on your Microsoft Windows NT 2000-based computer, the installation fails.You may receive an error message that is similar to the following:
1635 This patch package could not be opened. Verify that the patch package exists and that you can access it, or contact the application vendor to verify that this is a valid Windows Installer patch package.
A Windows Installer patch is also known as an .msp file.
This problem may occur if all the following conditions are true:
  • You are using roaming profiles.
  • More than one patch has been applied to a product.
  • Each patch is in a different network path.

Service pack information

To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to obtain the latest Windows 2000 service pack

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows 2000 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date         Time   Version         Size       File name--------------------------------------------------------------  13-Mar-2003  19:46  2.0.2600.1183   2,017,792  Msi.dll          11-Mar-2003  16:01  2.0.2600.1183      64,512  Msiexec.exe      13-Mar-2003  19:46  2.0.2600.1183     305,664  Msihnd.dll       13-Mar-2003  19:46  2.0.2600.1183     847,872  Msimsg.dll       11-Mar-2003  16:01  2.0.2600.1183      39,936  Msisip.dll
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows 2000 Service Pack 4.
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Article ID: 816554 - Last Review: 10/26/2006 22:12:52 - Revision: 2.6

  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional Edition
  • Microsoft Windows 2000 Server
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