Well, i finally managed it, anyone interested as to how.
1. Installed dual choiced windows 7 disc, 32 / 64 bit, opted for 64 bit, hey presto, in it went, then straight to microsoft and linked up for windows 8 preview, it checks you system and install it, so there ya go, done and dusted, hope this helps anyone else with the same problem . Also checked system info, and it states 64 bit
have a nice day