If Windows 10 "upgrade" affects GRUB2 and screws up my dual boot with Ubuntu will I have to completely wipe my computer and start from scratch? [closed]
Solution 1:
Who knows? It's the best part of a year away.
The reason I'm answering this rather than voting to close is because even though we don't know yet, it doesn't really matter. Even if Windows Calculator deep-fries GRUB every time you use it, the answer is the same: just restore GRUB.
If you're going to use Windows, the most important thing you can know is to keep a LiveCD around and know how to look for one of the GRUB reinstallation pages or or a Boot Repair CD.
Windows will always do what Windows wants to do, just learn how to cope with it.