On Thursday 01 November 2001, Microsoft issued Security Bulletin MS01-054, discussing a security vulnerability affecting Windows 98, ME and XP. Today, we received reports of problems with the Windows ME patch only. We immediately removed the Windows ME version while we Investigate the issue further. The problem is that upnp.dll does not seem to be registered. This is the case when UPnP component is already installed (via Add/Remove Components) and the update is applied. Result is Explorer hangs and machine performance can be erratic. However, in the case where UPnP component is not installed, the update is applied, and then UPnP component is added, there seems to be no issues. Apps including IE work and Explorer is fine at each and every stage. As soon as a new patch is available, a revised bulletin will be posted and announced.The Windows 98 and XP patches are error free.

Customers who are experiencing problems as a result of the Windows ME patch can go to the %windir%\system directory and run "regsvr32 upnp.dll" (no quotes). Reboot. Customers who are unable to register the upnp.dll should contact Microsoft Product Support Services for assistance.