Dell Support are excellent, helped me out of a hole several times. Which is one of the reasons I buy Dell.
I always buy it with their on-site support package. It costs, but is worth it. I've had Dell technicians here twice, replacing battery and touchpad, and watched them take over my screen remotely to run software repairs several times, including just this last Sunday.
I also have an on-line backup running (in addition to doing a manual back-up from time to time onto a memory stick), which backs up automatically every day. I have to pay for it, bacause it's backing up a lot of stuff, but again worth it. The only snag I've found is that Lloyds Bank refused to process the payments (in dollars), had to switch to Nationwide. I can even access my files through their app on my iPad!