After installing SCSP 5.2.9 MP5 (18.104.22.1685) on Window XP and 2003 servers, the COM & LPT ports are no longer working. A yellow exclamation mark is shown next to the COM & LPT ports in the Device Manager.
A yellow exclamation mark is shown next to the COM & LPT ports in the Device Manager and looking at the properties of the devices - the following error message is shown:
This is caused by the SCSP device filter drivers that were added during the install of SCSP and the devicefilter is conflicting with the COM & LPT drivers during boot.
The solution is to run the DeviceFilterInstall utility with the -r parameter, here is an example;
This utility is attached to this KB.
Windows XP Professional.
Windows 2003 and 2003 R2.