Dell C521 Will not boot

My SFF Dell C521 will not boot to its HardDrive. But when i put the same harddrive in my Dell XPS 410, it boots with no problems.

I have had this OS on the C521 before, and it worked just fine.\

The farthest it will boot is when the Windows flag is just forming, then restarts the pc.

I have no idea why its doing this. Any ideas?

SPECS:
Windows 7 Home Premium x64

AMD Athlon X64 Dual Core Processor 2.0GHz 3800+

2.5GB Unbuffered DDR2 RAM

PCI SLOT 1 Empty; 2 Empty; 3 Network Card

Hitachi HDS725050KL 500GB HDD

Sony CRX310S CD-RW/DVD ROM

Integrated Video Card Memory Size: 128MB

Dell Dimension C521 Small Form Factor Desktop w/ BIOS version 1.0.3 (10/02/06)

If you need any other info, let me know.

benjy206 said:

Jake1211 said:

My SFF Dell C521 will not boot to its HardDrive. But when i put the same harddrive in my Dell XPS 410, it boots with no problems.

I have had this OS on the C521 before, and it worked just fine.\

The farthest it will boot is when the Windows flag is just forming, then restarts the pc.

I have no idea why its doing this. Any ideas?

SPECS:
Windows 7 Home Premium x64

AMD Athlon X64 Dual Core Processor 2.0GHz 3800+

2.5GB Unbuffered DDR2 RAM

PCI SLOT 1 Empty; 2 Empty; 3 Network Card

Hitachi HDS725050KL 500GB HDD

Sony CRX310S CD-RW/DVD ROM

Integrated Video Card Memory Size: 128MB

Dell Dimension C521 Small Form Factor Desktop w/ BIOS version 1.0.3 (10/02/06)

If you need any other info, let me know.

Did this same hard drive boot on this computer before? Without making any changes to it. The problem could be that it has different drivers and chipsets for the both pc's

Yes, it did it worked just fine. With both Windows 7 x64 And XP x32

benjy206 said:

Ok and did you try to boot into safe mode with it?

No i did not i will try it now. With CMD? or just regular?

Nope im still stuck

Yes i am trying repair right now