To clean up a damaged COM+ catalog:
01. Rename %SystemRoot%\System32\Clbcatq.dll to %SystemRoot%\System32\~Clbcatq.dll,
making sure that you include the tilde (~).
02. Shutdown and restart your computer.
03. Delete the COM3 sub-key from the registry at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft.
04. Open a CMD.EXE prompt.
05. Type pushd %SystemRoot% and press Enter.
06. Type rd /s /q Registration and press Enter.
07. Type popd and press Enter.
08. Type exit and press Enter.
09. Use Notepad to remove Hide from the COM= line in %SystemRoot%\Inf\Sysoc.inf.
10. For Windows XP:
A. Open a CMD.EXE window
B. Type the following commands, pressing ENTER after each line:
regsvr32 /s ole32.dll
regsvr32 /s oleaut32.dll
11. Start / Settings / Control Panel / Add/Remove Programs / Add/Remove Windows Components.
12. Press Next and reinstall COM+.
NOTE: If Windows File Protection blocks any of the above renaming and/or deletions,
perform those steps in Safe Mode.