Vista - Bizarre problem.

Hi everyone. I've been trying to install my audio recording software(Cubase) but the installer just hangs at the splash screen before I can do anything. It used to install fine on my XP machine and it's said to be compatible with Vista. I'm on a q6600 with 4gb of ram and running Home premium. Running it with xp compatibility mode doesn't work and neither does running it with admin rights(I'm on admin account anyway). I also tried it with UAC off. But it works on my friend's dell xps laptop with vista home premium, installs and runs fine. Doesn't hang on the installer splash screen. Naturally this made me think it was due to my hardware BUT I actually got the installer working in vista home premium under MS Virtual pc 2007. I've also tried booting up into safe mode and trying it to no avail. It's just so confusing. Is there anything else I can try?

The *same* program (not version, same physical file)?

If so, download it again (don't delete the one you have, don't overwrite it - rename the new download) and try that.

Yep, it's the same physical file, I also thought it might've been corrupted but the same file installs on other PC's and under MS virtual PC.

Did you get the Vista version of it? Or are you trying to install an older version?

There's no vista-specific version of it, the developers claim its compatible with vista(as I have tested on another pc with vista) but on mine it refuses to install. I did get it working in MS virtual pc with an XP installation on my PC which kind of rules out a hardware incompatibility so I really don't know what I can do. I appreciate the help.