Can i suggest you speak to the person the supplied you this copy of windows, post back if you need any further advice :)
Hmmmmm... I was about all ready to call you on this, but, seems you're right
I bought the disc at a fair type event, the guy was selling them on the cheap - I was building the PC at the time and went on the off chance of spotting a bargain.
Although I didn't find any hardware I came across this chap selling copies of Windows cheap.
When I asked him about them and why they where so cheap he claimed it was because they where the ones that came with computers when bought by a business. The copies he was selling, he told me, where the ones that came with a version of windows but they had upgraded them to the next - This was backed up with an sticker that looked like the ones you see in offices, the ones you see stuck to the sides of the machine with the key on them. The discs looked real, the sticker looked real and, to be honest, it sounded plausible so I handed over my hard earned.
After bothering to Google it, then, yeah - You're right :/ -It isn't a legal business practice to do that and often results in problems - Lesson learnt. And a little less faith in buying software from a fair that seems to good to be true.
Just going to start again on the software front I think.
Going back to my original problem - I sorted that - It was an additional piece of software that came with the update that was causing the problem - "AMD Quick Stream" - It's supposed to organise your bandwidth to make it more available to more devices, or something. Anyways, causes havoc with browsers and general internet use and sent my PC in to BSOD hell because of it - Probably something to do with this stupid Windows I have.
I just uninstalled it from Device Manager and problem solved. Well, that one at least.
I'll get myself organised with a proper official copy, install the updates as I have and then come back with a "Yay" or "Nah" on if it was the the dodgy copy, or the the dodgy AMD software that was the problem so then people can use it for future reference. I'm sure I'm not the only one in this boat (Google tells me I'm not the only one with dodgy bought DELL Windows) so hopefully it'll be useful for someone in the future.
(In case anyone is reading this and wondering - DELL Machines confirm the serial code for Windows with a hardware reference, when Windows is installing it checks the hardware instead of asking for a software key to confirm it's a genuine install)
Least something is learnt from these mistakes!