I usually don't partition my linux drives, but on windows it's a different story. I recommend you to at least have it partitioned in three. One for windows C:

I usually don't partition my linux drives, but on windows it's a different story. I recommend you to at least have it partitioned in three. One for windows C:, one for your data D:, one for linux E: As soon as you install windows, reassign "MyDocuments" to D: Whenever you have a windows crash, you just reinstall and keep your data safe. You could also boot from linux and try some repairs or backups. I've done that for every family member and friend, and couldn't be happier everytime I get "that" call. No matter how many times I wear that "I won't fix your computer" t-shirt, I always get the call.