No, luckily I backup on a regular basis, actually what I usually do, is copy my files I need/want to keep to an external hdd, then once a week, I will plug it up, and sync one way pc to hdd, then we have an old desktop, hooked to the tv for watching netflix, or blu-ray and other media, it has two drives a 40gb for the os, and another TB that we sync all the other pc's with over the network. This way no matter what happens I have at least one extra copy. I've never really had any luck repairing an installation using normal "backup" software I always lose something, so now I just keep my folders synced on the other two hdd's.
But, I haven't even started to attempt to copy files back to this pc. I debated about whether to buy this machine with 8.1, or spend the extra $100 to get a identical hardware pc with W7 instead. I had used 8 one time and knew I would not like it, but just didn't have the extra $100 to spend right now, I still have a couple of weeks to decide if I"m going to keep it or send it back and get the 7 machine. There is a 98% chance I'll be exchanging for the 7 machine. I loathe 8, I just hate everything about it. Again I'm getting side tracked.
I haven't copied any of my saved files to this machine, I wanted to make sure I was going to keep it before I spent the time to do the copy, and I thought I had Onedrive turned off, I found it when exploring the day I got the machine and thought I had it turned off. Then about 10 days later I got on one morning, and had downloaded a file that my wife needed, and I was going to just access her document folder remotely over the network, and at that point I noticed my computer name had changed from Robby to 5734, which made me start looking and over night the name, and user had both changed, and about 10 files dated back in 2009-2010 had downloaded to the Onedrive folder, files that were originally made on the Acer 5732 machine. I don't remember loading them to what was skydrive, but being 4 years ago, I could have forgetton about doing it. But I most certainly did not give this machine permission to access that account, and I sure didn't ask Microsoft to put Onedrive on here. There are reasons I don't want things backed up to the cloud. As far as I'm concerned having Onedrive preinstalled with no way of uninstalling is theft, and identity fraud, among other things. Luckily I found a reg hack to disable it, but would prefer to uninstall it. My point is there is no reason why or how the info changed, but it did.