If you tried to uninstall Microsoft Proxy 1.0 or 2.0 and the uninstall failed:

01. Delete the following folders on your disk, if they exist:

<b>      \urlcache
      \msp
      \winnt\system32\msplogs
      \inetpub\scripts\proxy</b>
02. Delete %SystemRoot%\System32\drivers\ipfltdrv.sys, if it exists.

03. Delete the following registry keys (and sub-keys), using Regedt32.exe:

       <b>HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3Proxy

      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WSPSrv

      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3Pcache

      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\IpFilterDriver

      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mspadmin

      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mailalrt

      HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Currentversion\Uninstall Microsoft Proxy Server

      HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\W3Proxy</b>
04. Delete the following value names at:
<b>    HKEY_LOCAL_MACHINE\Software\Microsoft\MS Setup (ACME)\Table Files

      <b><MSP@v2.0.372.12></b> - for <b>Proxy 2.0

      <b><MSP@v1.0.194.2></b> - for <b>Proxy 1.0</b></b></b>