Windows 7 wont install?!

[intentions]

I'm trying to sell my alienware laptop and I wanted to reinstall windows so theres nothing on the hard drive. But, when the installation is almost done this error pops up..

http://i.imgur.com/Kq2g0.jpg

Any ideas? It's the windows 7 disc that came with the computer. I tried calling Alienware but they wanted 120$ to fix it...

 

[getochkn]

Drive set to RAID in the BIOS?

http://support.microsoft.com/kb/2466753