I have tried multiple times to install the 32 and 64 bit RC's to no avail. My system is: GA-EP45-DS3R motherboard with the latest FC11c BIOS 320 GB SATA HDD 4 GB RAM E7400 processor Diamond 4670 Graphics I have done the following: (1) Removed all USB peripherals (2) Switched SATA port and configured HDD in BIOS to use AHCI. (3) Set BIOS to boot from DVD (4) Copied Windows 7 to DVD using lowest available speed (4x), with Active@ ISO Burner. All installation attempts thus far have been clean installs from the DVD. Have not tried upgrading from my licensed copy of Vista Ultimate SP1. In point of fact, I am at my wit's end, and I am on the verge of concluding that, as always, Microsoft leaves me feeling ... well ... micro and soft. I've heard it's a great OS, but looks like I've already spent too much time on it. Seems like MS insists on wasting everyone's time with half-baked installers, no documentation, and the like. I know it's a Beta, but even so, ... I mean, it doesn't even install!!! Any additional suggestions will be welcome. Guess I'm just a glutton for punishment.