Its working fine so far.
However, if you have any payware that uses the Flight1 purchasing module to install, you must right-click and select "run as administrator" for it to work properly. Or at least in my experience. I also disabled my firewall in the process of troubleshooting. I left it down for all of the reinstalls. I can't say if it really matters.
From the 'help' guide on the flight1 website, it looks like these issues may have existed in vista also; but I didn't have vista, so its all new to me.
I'll report back if I run into any errors.