changing OS from 32 bit to 64 bit.

so i should follow option 3 instructions then.. is this straight forward or is there anything that i need to know before i do it ?

Yes. Very staightforward. Never seen it fail.

This is provided since Win7 release by MS as a convenience so the qualifying OS doesn't need to be installed first on a new, wiped or replacement HD.

straightforward !!! well, i just clicked the download, right clicked on it in the folder where it was, clicked run as administrator and i get this windows script host.....on a computer running microsoft windows non core edition, run slui.exe 0x2a 0xC004D302 to display the error text . error 0xC004D302 ???

Try it again. If that fails try Option Four. You have 30 days so no panic.

ok...cheers

ok. i can get the command prompt up when choosing option 3 but my computer will not restart. i have to manually turn it off. so what should i do to get to my installation, and should i now choose upgrade or custom ?

If you're already doing Option 4 then it is Upgrade.

Did you reset BIOS to defaults?

no, i couldnt get to bios. i powered off , then on again pressing ESC plus F1 down but all that appeared was the windows blue screen with my name and password box below my windows little picture ... i tried it with F2 but the same thing happened ??