Probably the simplest fix is to uninstall MSAS beta1. (I'd also delete this from programs.)
Continue with the install of the "winrar, (Inno install pack) ".
Then get the new (6/24/05) update beta release of MSAS here MicroSoft AntiSpyWare Refresh Download
This will avoid the conflict with the MSAS, I think. Anyway, you'll know now not to block
any changes for that particular program.
I'd also reset the system restore processes - you might need it in the future...
Seems the easiest fix to me.
The only easy day was yesterday.
...some do, some don't; some will, some won't (WR)