Greetings...Modders.. system spec.. ASRock Wolfdale1333-d667- Mother bOard Ambios 2005 American Megatrends Inc. Bios p1.30 160g Sata Drive 80g Ide HDD 1.5 MB memory Sata dvd burner Liteon dvd burner.. Recently i was trying to fix a compatibility program..so i decided to flash my Bios with a newer version for my supported board p1.50. At that time vista was installed and running quite good but after flashing the bios Vista stop booting.. windows state that a recent hardware or software change might be the cause of the problem.. i try numerous things nothing works for one week now.. however i install XP on the system and it start and run ok.. what could be the possible cause why vista cant be installed on the system anymore?