I've been running the Beta for a few weeks on a Dell Latitude D420 notebook, 1GB RAM. Not exactly a speedy machine, but performance was acceptable -- at least as good as with XP. Overall stability and compatibility also seemed fine. I'd enabled TPM and BitLocker, installed the Kaspersky technical beta (not real happy with that product, but I digress), Office 2007 and both Photoshop and Acrobat from Adobe Master Suite CS3. Also installed Firefox and ObjectDock (Stardock).Things were working fine and I was pretty confident with the system. Until Friday, when I went to resume from hibernation mode, I was told the hibernation file was corrupt and the system would restart, losing my saved work. This was no problem, as I hadn't left anything important open, in fact, there was nothing important on the machine.But the system would not boot. I tried various built-in recovery procedures without success. Typed-in my BitLocker key so many times I think I could do it from memory now. The system shows the boot-up screen for a minute then the screen goes black. After a few minutes of disk activity the system just shuts off. Each restart prompts me to enter the BitLocker key to verify changes to the disk, so it seems that something got hosed on the disk. Pressing "F8" during startup does not provide any options to show diagnostic messages on the screen -- in fact, it shows no options at all (has this feature been changed/removed).I guess I'll start over again. It's not that big of a deal, but I'd like to be able to at least find some diagnostics info to send you for analysis. I searched the forums but didn't find any similar posts. Quite possibly I have a hard disk going bad, though the machine didn't have any problems before running XP with SafeBoot. Unfortunately, the disk in the D420 has an oddball interface and I have no way of trying to access it without a working OS on the notebook.So I guess I'll start over again and see what happens. Any suggestions on how I can get some diagnostic info if this happens again would be appreciated.Thanks.

Try this. Boot with the Windows 7 DVD. When you reach the screen where it asks you where you want to install, hit <SHIFT><F10> to enter the Windows PE command console. From there, see if you can run chkdsk c: /F