I get a registry error when trying to use the Hi-Q midi sounds. Can't use them. Anyone else encounter this? If so, how did you fix it?

I've tried installing off the hard drive and downloading SampleTank directly from IK Multimedia, and have the same issue.

I'm running Windows 8, if that makes any difference. SampleTank works on my Windows 7 laptop, but not on my Windows 8 desktop.