Issues with Windows 8.1 on a new PC

[Broax]

First of all this is my first post so hello everyone!

That said I've been using Windows 7 on my personal PC for ages but this week I've upgraded my PC with some scrap parts I managed to gather and on this "new" more robust computer I've installed windows 8.1. Sadly this came with a couple of issues.

1. I'm pretty sure my copy of Windows 8.1 is genuine as I got it through DreamSpark. The thing is, even though I was able to activate the CD-Key I got I don't get the "Windows Genuine" logo on the "system" window. On the other hand I don't get any of the pirated version errors or messages so I'm not sure if it's genuine or not.

As I aparently can't post URLs you can check a screenshot here: i.imgur.com/MKOyOEc.jpg

2. I tried to install all the available updates (>100) but after a long while (after they seemed to install just fine) I went to check them and about half say they are installed with errors (I'm not 100% sure this would be the proper translation as my windows is Portuguese). Windows tried to install all these updates twice but now they remain with these error messages and windows says all the updates are installed...

Here's an image of the update list with these "Com Falhas" (with errors?) messages: i.imgur.com/Wvmv5EX.jpg
Here Windows is telling me there are no new updates: i.imgur.com/vbGVxZ3.jpg

3. I have no icon inviting me to upgrade to windows 10 even though (a) my computer complies with all system requirements and (b) update KB3035583 seems to be installed correctly (this one doesn't have the error I mentioned previously).

I haven't used my windows live account in ages so I didn't remember my password and now have to wait 30 days for the reset. I made local accounts for both Windows 8 and Office until I can fix this but I don't think this relates to these issues.

Here's the current build that's having these issues:
CPU: Intel Core 2 Quad 2.4Ghz Q6600 (used)
RAM: 8GB DDR2-800 (2 new modules and 2 used modules)
GPU: Nvidia GeForce GTS 450 1Gb (used)
Board: Gigabyte GA-P35C-DS3R (used)
SSD: Kingston SSDNow300 120GB (new) <- Windows is installed here
HDD: Some random 350GB Hard Drive (used)

I ran a couple of stress tests including burnin test and everything seems to be just fine. I've also tried MS Windows Update fix tool. That found a couple of errors at first. The tool fixed them but the updates continue to not install...

I'd love if someone could help me out with this as it's killing the "new pc" joy... :/

PS: Everything else works flawlessly. I have no errors in no program. Games run smoothly. Steam downloads at an average of 15MB/s (which is great) the computer boots in 20secs (this board doesn't have an UEFI BIOS) and even though the board only supports SATA2 the SSD has respectable speeds (much better then a mechanical drive). It's only the updates that are stuck!

[Digerati]

Looking at the DreamSpark Student Software Catalog, I don't see Windows 8.1 listed. Do you have a link to where you got it?

And when I look at the DreamSpark website, I see nothing about Windows, just other Microsoft software. In fact, on this page, it says in their bold and my underline,

DreamSpark is simple: it's all about giving students Microsoft professional-level developer and designer tools at no cost

So I am not sure this is a legitimate copy of Windows - I am starting to suspect it is not.

[hackerman1]

@Digerati:
I don´t see W8.1 on that webbsite either.
But students have access to (almost) everything from Microsoft, except: Outlook, Word, Excel & Powerpoint.
I know...
As a student I have got W7, W8, W8.1, WS2008-R2, WS2012, WS2012-R2 and a lot of other software from Dreamspark.
And it´s all genuine, with productkeys for software that requres it.

"DreamSpark has the tools you need
Sign in or create an account to download these software & development tools at no cost;
or check if you can get more software through your school."

If you click on "check" you get another page where you login....

@Broax: It´s known that productkeys from Dreamspark can give you errormessages about not being valid etc.
Contact Dreamspark-support through the supportpage, and you will probably get an answer from your local Dreamspark-administrator at your school,
and explain the problem.