Still no luck. I've restored the friday situation, but no luck. What's worse, the restored Rome won't even start, and all folders in the Rome - Total War folder appear to be empty of files such as textures. Which is strange, because it was definitely working saturday afternoon.

Uninstall still doesn't work, not for Rome or for Alexander. Alexander it does absolutely nothing, for Rome it briefly shows a loading bar for InstallShield Wizard but then gives up.