Do you have anything critical on the Windows partition? If not, just wipe it from Linux and reinstall Windows from scratch? But before you do that, if the parti

Do you have anything critical on the Windows partition? If not, just wipe it from Linux and reinstall Windows from scratch? But before you do that, if the partition isn't encrypted, you might want to look for a key extractor to pull the old product key from. Sometimes it's also on a sticker on your computer, but if memory serves, that might not be a real one that you can actually activate with (Google it, I can't remember the details, sorry). Hopefully after a reinstall, the old key + your hardware signature should let you activate it for real. Otherwise, maybe you can use a temporary activation key (Google one from the piracy sites) but then activate by phone using the old product key you pulled. You have a legitimate install from your OEM, you just have to convince Microsoft of it, and phone activation is usually the way to do that... Otherwise you can always buy another Windows license (either legitimately or from one of many shady places...). It's probably easier than trying to disable the password, IMO. Costs more though =/