Source: http://www.techgroup21.com/sub2page.asp?sub2navID=19

Try these steps to fix the problem.

1. Open your RUN window from the start menu, type in "regsvr32 msscript.ocx" and hit enter
2. Do the same with dispex.dll, and vbscript.dll
3. Open windows explorer, select folder options in the tools drop down.
4. Select the file types tab
5. Scroll down to the extension type JS, highlight it and hit the advanced button
6. Highlight the Open command and hit the edit button. If you have more than one "Open" command showing (which was part of my problem)delete one of them.
7. In the field "application used to perform action" paste in this - C:\WINNT\System32\WScript.exe "%1" %* your done.