Do you really need Windows partition? I'd do a fresh install of Linux Mint only, wiping Windows partition. Linux Mint and Ubuntu have given new life to my two 10 year old work Macbooks that could no longer update OSX.
Discussion
There are just a couple of programs, and I could probably do without them. So far it's been OK dual booting to be honest. It goes straight to Linux and I have a csoare tire" if needed.
Fair enough. You could try run your needed Windows apps in Linux with Wine. It's quite hit-and-miss but you might be lucky.
I hear you, and this is in the back of my mind. I've futzed with Wine before but never had any luck. Still, when I go full linux, I'll likely give a go if I need it.