...I don't see why this would be if it can run Windows 7 on 64 bit
First off, quit comparing Linux to Windows.
Linux is not
"incapable of loading it"... could be any number of things and is not very descriptive.
Topic says " No Slackware 13.137 GUI on my laptop". Is that 64 bit also?
Did you use a previous /home directory?
Can root startx?