Re: Windows Update....................
Best have an unlimited download volume before you switch that on again and don't expect to have a usable machine for half a day or so..
I have an extra work laptop which mainly lives in a cupboard because it has tools on it that have no place on a production network other than for the tests this machine does - certain tools you just don't leave online (especially when they're part controlled by a third party, too complicated to explain here).
If I don't start that machine up every month or so in order to keep it updated I know I won't have a usable machine when it really counts.
That said, I now also have a Mac for the same job. Also far less power hungry - where the Dell needs power after an hour or so, the Mac happily runs for a whole day on a single charge and is quicker to boot (both literally and figuratively). Once it's been fully set up we may just retire the Windows laptop..