I started installing Windows 7 RC from scratch, at first it was working till it reached "completeing installtion" and it went to restart it freezed on the windows logo and no action from the H.D.D or the DVDRom when i tried it again it freezed after "windows preparing files" only the "starting windows" with the win logo, i tried to upgrade running it on winXP it didn't work also, i made 2 copies from the iso source with 2 different DVDRom and 2 different DVD discs.

PS: i installed this copy from the same DVD disc i used on my desktop, on a my Dell Notebook with 3G RAM it worked so fine with no sweet and no problems.

PS: I have one ram with double side chips and the other one is single side chips.
I am really stuned, plz help.