If you installed IE 4.01 SP1 or SP2 or IE 5, and you receive any of the following when you first restart your computer:
Unable to find function "DLLRegisterServer" in file C:\WINNT\SYSTEM32\COMCAT.DLL. Error occurred calling "DLLRegisterServer" in C:\WINNT\SYSTEM32\ASCTRLS.OCX (HRESULT=80004005). Error occurred calling "DLLRegisterServer" in C:\WINNT\SYSTEM32\DAXCTLE.OCX (HRESULT=80004005).who may have a damaged or incorrect version of %SystemRoot%\System32\Comcat.dll.
To workaround the problem, rename %SystemRoot%\System32\Comcat.dll to %SystemRoot%\System32\Comcat.old and reinstall IE.
NOTE: If you elect to uninstall IE first, do the rename after the uninstall.