Same thing happened to my nexus 5. Constant reboot loop. I sent it in for repair, and they replaced the entire outer housing. It seemed to be fine after that, but I didn't keep it long enough to really find out. After 3 Android phones dying too soon because of similarly weird things, I'm out of Google land.

I second all the people that said PortableApps.com, but don't gear it to open source (nobody cares). Gear it to making their computer faster and fixing viruses/spyware. Get a defragger (Smart Defrag), anti-virus (ClamWin), anti-spyware (Spybot S&D). Then maybe some useful installable programs like Recuva (recover deleted files), CCleaner (registry cleaner/hard drive cleaner...I think there are portable cleaners, I just haven't used them), etc. Then if you were feeling sneaky, throw in a trojan somewhere so you can mess with them later (anybody remember NetBus?)

This is so completely untrue! Android checks for upgrades every 24 hours, and allows you to easily upgrade any of your applications or the entire OS itself. I've owned the Droid since it first came out, and the ease of upgrading is one of the features I've been fairly impressed with.