Windows 7 x64 installation problem

My system specs are:
AMD Athlon x64 4400+ 2x2,4 GHz
4gb ddr2 2x2gb
nvidia 9800 GTX+ 512
usb mouse PS2 keyboard (Microsoft)
TP LINK Router wireless internet

just to mention. If I remove one memory slot everything goes fine, so that must be some memory compatibility problem. I run Windows 7 32 bit version, and everithing is OK. When I try to install 64 bit version, after finishing installation my PC rebotes and before the screen that should load the windows and where I should enter my personal information the blinking Windows logo freezes and all I can do is to manualy restart the PC, and after restart everithing repetes.
P.S. Sorry about my poor English

This website is not affiliated, owned, or endorsed by Microsoft Corporation. It is a member of the Microsoft Partner Program.