AMD Phenom II x6 1100T overclocking gone horribly wrong! Please help!

Hi there Jake1Master.

I know that this is an older post but I actually have the same CPU and similar Gigabyte Motherboard (ga-770ta-ud3) as you are using.
I'm not sure if this is already a fixed issue or if you gave up trying to fix this thing by now or what but I can definitely try to give you some pointers on what may be the issue just based off of what you posted here.

You have the best AM3 pre AM3+ CPU out there and it is still pretty good when OC'd properly.
I can tell you 3.8GHz should be pretty easy to achieve with your motherboard and a decent aftermarket cooler. 4.0 or higher can be a little harder to hit. And if needed I can help you out down the road with all of that.
And about the fact it shows the system bus only set to 20 in the bios is just a quirky thing with the ga-770t series motherboards. Mine does the same when it is left to auto... but I assure you it is 200MHz not 20MHz. Until you switch to manual it doesn't show the whole number there for some reason. If you are still struggling with this (sorry I came across this so late LOL) I strongly recommend you do as rollgg said and load the failsafe defaults in your bios and then I can go over every single setting with you from there.

So initially what I am reading here is that everything went south when you installed the AMD Overdrive app and something wasn't right so you hard restarted it and now this?
It appears to me that is the issue... as just installing the overdrive app would not in any way effect anything dealing with the processors frequency settings at all until you ran the program from windows and then adjusted frequencies within it and applied them.
You never got a chance to even get that far.

Obviously there was some issue that the program was having while installing when it hung on the restart.
And being it was engaged in possibly writing to the registry as it is a critical component given low level access to major hardware so hard shutting it down in turn more then likely led to some corruption of the registry for some other critical something or other dealing with the OS and it's ability to operate.

Installation hangs like that used to be all too common in the days prior to Win7... but anyways sometimes there's no way around it... and it sounds to me like there is some sort of buggy issue more then likely between the overdrive app and your hardware or possibly the current Radeon Drivers you have running on the machine.
I have had in the past and still have issues with AMD drivers routinely causing headaches of mass proportion just like this.
So congrats on your first possible re-install of Win10 due to buggy AMD software. It's what they call in the Army good training. Consider it your initiation into the world of overclocking. Drink water. Drive on. LOL

If you have a windows system disk I would try to use it to attempt to fix the issue... which more then likely can be fixed by just restoring to a point before the software was ever installed.
(I just reread that you already tried this issue and am editing my post accordingly... so that one is out. Damn LOL)
I was hoping that it may have just been a simple registry corruption that windows could detect and fix itself if you ran startup repair. More then likely this isn't the issue if you already attempted a software restore.
So it looks like you'll have to more then likely resort to a fresh install of Windows.

I have no experience with the new AMD Overdive App your talking about.
I have in the past used AMD Overdrive which could be found within the Catalyst Control Center under the Gaming or it may have been Performance (back then) option. I'm not completely sure as that was before the Crimson Edition drivers and the first time I used it for overclocking my GPU and CPU combined was way back when I had first bought my FX-8320 rig combined with an HD7850 years ago. And it was like only 3 or so months before I had traded the gpu over to an nvidia card and really started to get to the heart of my cpu OC using the bios... which I for one totally recommend doing anyways.
But yes back then it gave me a fairly simple option to adjust my CPU as well as GPU frequencies right in the Catalyst Control Center's Overdrive setting. Easy and effective for light tuning.

These days at least with the crimson Drivers I have, on the machine with the phenom 1100t which currently has an HD7850 paired with it and is running the newest Radeon Crimson drivers it doesn't include options for overclocking the cpu anymore at all under the Gaming - Global Overdirve setting. I pretty much rely on MSI Afterburner for my overclocking solution for the GPU also now.

But anyway I digress.
You fix the OS issue first ( I guess by re-installing Windows).
Then you can proceed to fidget with the other settings in bios and hopefully get set up with a pretty happy overclock running on your machine... without any more radeon crap having to get involved.

I'd be happy to help out with anything you have a question with.
Good luck.