Windows 7 - rebooting

i have a gw m255-e laptop i got that some one couldn't install an OS on it.the cd drive was bad.i took another hard that had win 7 on it and installed it.it worked fine until i tried to upgrade from 32 to 64 bit.now it just tries to boot up and restarts all over.i disconnect the bios battery and remove memory for a long time and put them back in.i change the boot up with different ways and it still just reboots.it won't reconize any usb drives that i try to install system or to wipe it out.any body help?thanks.

i found out that you can't do the upgrade so i wiped out the hard drive using my desk top and installed win 7 on it and put it back in the laptop like i originally did and it keeps rebooting over and over with no luck. i can set the bios to any thing listed and it still reboots.some one else tried the usb drive too and couldn't do it either.i'm wondering if the bios battery is no good because it wont boot to any but the hard drive or some mobo problem?thanks.

i don't know if you got my responce but i tried every setting in my laptop for first boot including usb drives.some one all ready tried a usb flash drive and it wont go to any thing but the hard drive which i believe is the default first boot.i wondering if it's the bios/cmos battery is bad or mobo problem?thanks.my cd drive that was in it was bad and i removed but didn't have another one to try.(sata).