Windows Script 5.6 for Windows XP and Windows 2000 would normally fix this and is available here.
http://www.microsoft.com/downloads/details.aspx?FamilyId=C717D943-7E4B-4622-86EB-95A22B832CAA&displaylang=en
Another user told us he was able to solve the problem like this:"All I had to do was go into the properties for the executable file and tell it to run as administrator AND under windows xp service pack 2."
Please let us know how you get on.