
- Download Microsoft's MSI Cleanup Utility from http://support.microsoft.com/kb/290301
- Install and run the utility (which is called msicuu2.exe) on your PC
- Locate the entry '(All Users) ReWaRD [2.5.20.806]' and click the Remove button
- Try installing Update 21 again
Please let us know if you have encoutered this problem and - more importantly - that this fix works for you.
And our apologies to all those who have been inconvenienced by this problem.
Andrew Bond