I tried installing Windows 7 Enterprise x64 on a Dell Optiplex 760. I used the Windows Media. The installation was so slow that I didn’t let it complete. I tried a 32bit version and there was no difference. I did some searching online and found a comment on Microsoft’s site that updating the BIOS should work.
I was using BIOS version A02. Updating to the latest version (A08) worked.
I then had a problem where the Windows 7 installer couldn’t see the physical hard drives. I went into the BIOS and changed the SATA mode from its default setting to something which I don’t currently remember and it worked. Windows detected the disk drives.
I’ve seen talk about installing the drivers and the problem goes away, but that’s not practical in manual pre-installation.
Techno babble from an IT guy named Harry 
Also make sure the C State option is unticked (not enabled) under Performance within the BIOS.
Pls i can’t finish my window 7 installion, because i had a message my driver not found. help me
Pls i can’t finish my window 7 installation on my DELL pentium 4 because i had a message my driver not found. help me