Windows 7: New build Help Boot Problem :(

Hello, ive built a new computer and i got some problems i dont know whats wrong
but after i built the computer i puted windows 7 CD and formated the Windows 7 it fully worked. then after i try to install a game i got BSOD,then when i boot up i get black screen and error please insert a proper boot device, this is killing me really im close to break the computer, and what i have done is Removed unplugged Changed IDE kable to the DVD Room to the Motherboard, changed SATACable from the SATA HDD, then i still get same error, ive tried 3 HDD and when i unplugg over the night it works actually but then if i Turn off the computer it happends same error. and i cant find the Drive in Windows 7 CD and cant find the harddrive in the BIOS also but it works if i let it 10-7hour unplugged from the HDD, then i start i can see it in BIOS the HDD but not for long. Whats the problem is the motherboard ****t up?, the Mobo is new everythign is new. i really want some help, is it the PSU? or what? what is the problem Please help

Sounds like a BIOS issue, update it to the latest version
ASUSTeK Computer Inc. - Motherboards- ASUS M5A78L LE

Turn off AHCI in your BIOS if it is on

i did the update and how wdo u mean turn off AHCI u mean Disabled the Chip Channel ? or waht to say?

Can it be that the motherboard doesnet support the harddrive at all? its like 1.5GB/S WEstern Digital Sata i really really want ive been for days trying to get help and fix this problem

Donliridon, I don't believe that it is a motherboard hard disk support problem.

You said that you had installed a game and then the bsod's started?

Where did you get the "GAME" and it sounds to me that the install might have
screwed up your system.

Of course after it all was working, you did create an image of your C drive so that
you could recover?

Also, have you looked into booting the windows install disk and doing a system repair?

Rich

Yeah, i was downloading World of Warcraft from battle.net but i recognized something in the Asus Page, Storage Built-in Controller :
6 x SATA 3Gb/s port(s), blue
Support Raid 0, 1, 10, JBOD SATA 3GB/s my Harddisk is 1.5 GB/s do you think that could be the problem?

ive tried to do the booting and do a systtem repair with the Windows 7 CD but dident work couldent find the drive.