Have you checked your CPU temperature???? Back in AH1 I was getin' booted after 10-30min of flight, and could not figure it out. I was swapin' my ram around, hoping it was something dumb like that when I noticed how HOT my cpu was. Logged in to AH, waited for boot, then jumped into my bios and looked at my cpu temp, and it was off the scale. Quick add of another fan, and I was fine.
Sounds silly, but worth a check. AH is VERY cpu intensive.
ALSO how about running a DXDiag and emailing it to
support@hitechcreations.com Fastest way for help would be to email, then call 'em. Skuzzy is GREAT guy who will be happy to help.