How to Manually Remove Proxy Server 1.0 and 2.0

In some cases, the uninstall program may fail when you try to remove Microsoft Proxy Server 1.0 or 2.0.

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 work around this problem, do the following:

1. Verify that the following services are stopped:
   • Content Index Service
   • IIS Admin Service
   • Microsoft Proxy Server Administration
   • Microsoft Winsock Proxy Service
   • Proxy Alert Notification Service
   • World Wide Web Publishing Service
   
   
2. Find and delete the following folders on the local hard disk, if they exist:
   • Inetpub\Scripts\Proxy
   • Msp
   • Urlcache (this folder may exist on more than one partition)
   • Winnt\System32\Msplogs
   
   
3. Find and delete the following file, if it exists:
   Winnt\System32\Drivers\Ipfltdrv.sys
4. Use Registry Editor (Regedt32.exe) to delete the following registry keys, if they exist:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\IpFilterDriver
   
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mailalrt
   
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mspadmin
   
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3Pcache
   
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3Proxy
   
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WSPSrv
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\W3Proxy
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Currentversion\Uninstall\Microsoft Proxy Server
5. Delete the following registry value(s)
   • MSP@v1.0.194.2 (value for Proxy Server 1.0)
   • MSP@v2.0.372.12 (value for Proxy Server 2.0)
   • MSP@v2.0.389.12 (value for Proxy Server 2.0 installed on Windows 2000 server using the install wizard)
   
   in the following registry key:
   HKEY_LOCAL_MACHINE\Software\Microsoft\MS Setup (ACME)\Table Files
   Note that some values may not exist, depending on what versions of Proxy Server have been installed on the server.

When you finish with these steps, you may receive the following messages in the Event Viewer System Log: For additional information about how to resolve this behavior, click the article number below to view the article in the Microsoft Knowledge Base:

If a Proxy Service Pack has been installed on the Proxy Server, it may be removed prior to uninstalling Proxy from the Add/Remove Programs tool in Control Panel.