Hello everyone, my first post here, I can't hide I regiestried myself here only for recieve a help. I've got DELL OPTIPLEX 755 without HDD and CD with OS and I have a problem to install WinXP PRO because sticker on it is from WinXP PRO. I tried from CD and DVD, some modified versions of XP and nothing works. I installed once win7 but with 2gb of RAM it didn't work well. How can I install Windows XP PRO on it? I tried to use clean XP PRO from MSDN and I even integrated SATA drivers through nglide but it didn't help too, I'm recieving blue screen which means, I found in google, that SATA drivers don't exist in installer, with different PC's was easier because I had FDD drive, in this PC I have no possibility to connect it and through USB it doesn't work. I count for help. 