A problem has been detected and Windows has been shut down to prevent damage to your
Computer.

If this is the first time you've seen this Stop error screen, restart your computer.
If this screen appears again, follow thease steps:

Check for viruses on your computer. Remove any newly installed hard drives or hard drive controllers. Check your hard drive to make sure it is properly configured and
terminated. Run chkdisk/f to check for hard drive corruption, and then restart your computer.

Technical information: STOP: 0x0000007B

This is the error message I get right before windows boots .. I KNOW it is common and there is plenty to read on microsoft's site but they describe different situations and I am not sure which one applies to me.
First of all, I tried that same hd in another computer and it boots fine. What is different: computer that gets the blue screen has a RAID controller and motherboard is ASUS.
From that info can u tell me what I can rule out and what the possible cause is?

Thank you!

Check this out:

When you start your computer, you may receive one of the following error messages:• STOP: 0x0000007B (parameter1, parameter2, parameter3, parameter4)
INACCESSIBLE_BOOT_DEVICE
• Setup has encountered a fatal error that prevents it from continuing.

Contact your product support representative for assistance. The following status will assist them in diagnosing the problem.

(0x4, 0x1, 0, 0)

Setup cannot continue. Power down or reboot your computer now.
You may also receive a "Stop 0x0000007B" error message during Windows XP Setup when the Setup program restarts during the installation process. When you receive a Stop error while the Setup program is running, you receive the second error message. To troubleshoot this issue, read the following four sections to determine if any one of the issues applies to you. If none of the issues apply to you, use the following general troubleshooting steps at the end of the article.

http://support.microsoft.com/default.aspx?scid=kb;en-us;324103

WebKing,
Windows XP 64-Bit