Windows 8 is still in pre-beta (i.e. there are bugs in it; some small, some large). Do you get this error with Windows 7 and below?
What is wrong?
I don't have a Windows 8 test machine in front of me right now, so I can't reproduce this bug. But if you can give me some more information I'll be able to help you out:
- Where are you installing your app? (i.e. C:\Program Files\Your App)
- When you run wyUpdate does it ask for UAC elevation?
- Did you disable UAC elevation?
- Try right clicking wyUpdate.exe and clicking "Run as administrator". Then proceed with the update. Does it ask for elevation? Does the update complete successfully?