Disabling of File Caching in IIS 4.0 Fails (265279)

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry

SYMPTOMS

When you try to delete a file that has previously been accessed through a Web browser and is located under the Internet Information Server (IIS) folder structure (for example, \\WWWServerName\Wwwroot), the following error message may appear:

Error Deleting File: Cannot (filename): There has been a sharing violation. The source of destination file may be in use. You cannot delete filename.

For additional information, click the article number below to view the article in the Microsoft Knowledge Base:

184956 Problems Deleting Files Under Internet Information Server

After you turn off file caching by setting the registry key:

HKLM\System\CurrentControlSet\Services\Inetinfo\Parameters\DisableMemoryCache

IIS is still caching the file.

CAUSE

In addition to DisableMemoryCache, there is another registry key affecting caching. Under the following registry key:

HKLM\System\CurrentControlSet\Services\Inetinfo\Parameters

you will find that there is also a value called MemoryCacheSize. This may be there from a previous version of IIS on a computer that was then upgraded to IIS 4.0.

RESOLUTION

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To resolve this problem, you can delete the MemoryCacheSize key under:

HKLM\System\CurrentControlSet\Services\Inetinfo\Parameters

and reboot the computer. To do so, use Registry Editor or a different editor to delete the relevant key.

If this does not help, install the latest service pack for Windows NT.

REFERENCES

For additional information, click the article numbers below to view the articles in the Microsoft Knowledge Base:

184956 Problems Deleting Files Under Internet Information Server

191742 IIS: Access Denied when Trying to Update Files on IIS Computer