|Bios shadowing means some of the bios functions are copied to RAM after bootup and, as already mentioned, wouldn't affect the bios finding a hard drive.|
Do you perhaps mean the bios options are greyed out meaning they're showing on a greyish background but you can't alter them? If so, yeah, some things in bios can't be changed. You may need to consult the manual for your laptop for info on proper bios setup.
message edited by DAVEINCAPS