I deleted Windows from my new U300s and am currently experiencing a number of bugs which appear to be BIOS -related.
Is it possible to update my BIOS without Windows?
What are my options?
You can use your Windows key to activate an install of Windows from Microsoft media, as long as they are the same version (Do double check that that you have the right version, though it will not matter if it were a 32 or 64 bit - refer to the Windows sticker on your machine.)
Note that you may need to use the phone option to complete activation.