Glad I asked. Yes, you made a mess of things for sure. But we can help you get it going again.
I believe we need to do a more exhaustive troubleshooting for you specific situation; to do this the very first thing we need is the EXACT Make/Model of your computer or laptop/table that is giving you the problems with the Internet connection. If you don't have that information or you have a self-built or custom-built PC, please download the free SPECCY program from piriform.com and post the output testing result text file back here to this thread so we can tailor a more customized solution for you.
Here's the thing you need to realize. You are not alone; thousands upon thousands of people are having problems with their Win10 upgrades!! I volunteer on multiple tech forums on the Internet--and I see many many problems just like yours every single day of the week since the release of Win10 back on July 29th earlier this year. The #1 reason people have problems, is that if their (or your) computer or laptop was not completely healthy (99%+) prior to the Win10 upgrade; problems ensue!!
This is a well known fact and has been a constant going back to release of Windows95 in 1995--20 years ago. This is nothing new. It sounds you and a great many people are attempting to do their very first Operating System (OS) upgrade on your own since everyone including Microsoft is advertising in the media just how easy it is to do. This is certainly not true!! There are hundreds of people every day all over the globe posting online all the woes they incurred trying to do this upgrade; both first-timers and people who have done OS upgrades many times.
Now the tools Microsoft has for identifying whether your computer is healthy enough for the upgrade (Win10) or not have improved vastly--and you should have used that PRIOR to attempting your upgrade. The problem is that Microsoft doesn't advertise this tool very well, and very few non-professional computer techs (i.e.: Home Users) would ever know how to find it, that it even exists, or how to use it! By the way the tool in the current iteration is called the MICROSOFT COMPATIBILITY TEST, which generates the MICROSOFT COMPATIBILITY REPORT. Here's the link on how to do this: http://www.tenforums.com/tutorials/6728-get-windows-10-app-check-compatibility-report-windows-10-a.html
It turns out that this Test is built right into Win10, but people either bypass running it, since they don't understand what it is or what is does, but it can also be run from the Microsoft.com website independently from the Win10 installer. This is an epiphany-level piece of information you probably didn't have prior to clicking the little Windows flag in your system tray for the Win10 upgrade!
The C-Test as I'll shorten it to, tells you if you have failing hardware or incompatible programs or drivers that will prevent Win10 from installing properly or if it does install, many of your devices won't work correctly: such as Wifi internet, touchpad, disk drive, webcam, lcd monitor display (internal/external), etc. The C-Test will also tell you to replace bad programs with their newer versions, or completely uninstall them until the Win10 upgrade can be completed. Once completed, you can attempt to reinstall the program--if it crashes your Windows--clearly it's incompatible and you must delete it. You can try to go back to the company or author of the program and see if they have a newer version of the program that will work with Win10. You may have to wait a week, a month, a year, or possibly never if that software company is out of business! This is the same with drivers for devices inside your computer too.
Given this information, you're probably thinking to yourself, I could have saved a lot of time and frustration if I just would have taken my computer into my local repair shop or independent licensed Computer Pro and paid them to do it for me; right? Well, again, you're not alone. They know about the C-Test, how to run it, why it should be run, and what the results mean, and what to do about it to correct them. This is well worth the $40-$120 they charge--at least in the US. Could be 2-3 times that in the UK where you are. Australia particularly is off the charts at $600 for an OS upgrade.
Next, here's what I recommend you do while we are waiting for you to post back the specifics of your computer specs. You will need to take from 2-4 days out of your schedule non-stop to do some advanced troubleshooting and repair of your computer. Here's a document I created for another Win7 user who crashed his machine horribly after attempting and botching his Win10 upgrade. Here's the link: http://windowsforum.com/threads/cursor-cannot-reach-top-of-quick-launch-area.214710/#post-654289
This is a very long post, of necessity, but is a step-by-step instruction on how to test both your hardware and software running on your computer, whichever make/model it is. You MUST test your hardware first; contrary to what many people post here on this forum; they like to jump to a software solution. Unfortunately, as I outlined above, if your hardware fails, and you attempt various software repairs, THERE IS NO SOFTWARE ON THE PLANET THAT CAN FIX FAILED HARDWARE!!!
Once you verify your hardware is ok, and you replace any failing or failed components; you can then proceed with the software diagnostics and repairs. Make special note of the Backup Caution; some or all of these repairs can cause irretrievable data loss from your computer if you do something wrong. Once again, this is why professional computer repair people like me get paid for their knowledge and skill in fixing computers. Seems obvious, but many people prefer to attempt on their own, and only will take it to a Pro when they get seriously stuck. Other people simply don't have the financial resources, such as Seniors on a fixed income or pension.
This is a lot of information to take in. So, you might want to take a couple of reads of this post to try and wrap your head around it.
Post back your specs, and we'll advise you then shortly.
If you do decide to tackle fixing your machine yourself (DIY), be prepared to be patient as I said above, this is not going to be a 5 min. fix as many millenials will tell you if you ask them to help. Also, ask questions if you are unsure about doing something, there are No Stupid Questions here. It's always better to ask one of us Pros about something you are not too sure about, than to just do it, because you are feeling pressured to get your machine working again, or frustrated at lack of progress. Ok?
Edited by BIGBEARJEDI, 09 November 2015 - 10:39 AM.