This article was previously published under Q271670
This article has been archived. It is offered "as is" and will no longer be updated.
When using Mswcrun.msm in a Windows Installer setup package, the associated registry entries needed for Mswcrun.dll may not be added correctly. Because Mswcrun.dll is not registered, applications that use the Microsoft Web Classes may not function correctly on computers that do not have Visual Studio installed.
This is due to a bug in the Mswcrun.msm file.
Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article. This bug was corrected in Visual Studio 6.0 Service Pack 5.
For additional information about Visual Studio service packs, click the following article numbers to view the articles in the Microsoft Knowledge Base:
194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why
194295 HOWTO: Tell That a Visual Studio Service Pack Is Installed
To download the latest Visual Studio service pack, visit the following Microsoft Web site: