Can not install ANY versions of dot net framework on my windows 7, windows update always fails too

[hoover1979]

after a repair reinstall of windows 7 all dot net framework versions are no longer on my system. I can not even do one single update on windows update due to a 100% failure to apply and also a 100% failure to revert first time, meaning a second time to revert and over an hour wasted.

I can not install any version of dot net framework manually due to appcrash half way through, or it not even starting to install.

dot net 3.5 = extracts, but never starts installing

dot net 4.0, 4.5 & 4.6 = gets half way through the creating profile then appcrash (Error Code: 0x80070643). The microsoft dot net fixit does not help and I do not know what to do as nearly all my apps and games appcrash with no dot net frameworks installed, leaving my PC virtually inoperable.

Windows rollup udates also have a 100% faliure rate. This is a new install of window 7 pro on a new drive so I fear reformatting will not help and add the migraine of reinstalling tons of apps and 600+ games from scratch again. The repair install made things worse by removing all versions of dot net and now preventing them from installing!

I can't even try windows update for dot net as it has been hanging on "checking for updates" now for an hour and counting. I bet my teeth if I left it over night (its 7:38Pm here now) and checked it in 12 hours it will STILL be stuck "checking for updates"
I bet it's perma-hanging at 0%


My Specs:

ASUS Z97-k Motherboard
Intel Core i7-4790k @4.0Ghz
Noctua NH-L12 Cooler
Over 20-Tb of total HDD storage (5x Internal + 2x External)
Gigabyte GTX760 OC Edition @4Ghz (My Gigabyte GTX970 G1 Gaming is being repaired)
ASUS VG278 120Hz 3D Monitor
Antec 600w PSU
32Gb Corsair Vengeance Pro 2400 DDR3 RAM
Soundblaster Zx
Logitech z506 Surround Speakers
ASUS RT-AC68U Dual Band router on Australian NBN connection (100Mbsp DL / 40Mbps UL)
Logitech F-710 Wireless Controller
Logitech G502 Proteus Core Mouse
Logitech G710+ Gaming Keyboard
Fractal Design Define XL-R2 full tower case
LG Blu-Ray Drive
Nvidia 3D Vision 2 Kit

Please Assist!!!

 

[Phillip Corcoran]

Try running this MS tool: http://windows.microsoft.com/en-gb/windows7/what-is-the-system-update-readiness-tool

 

[hoover1979]

Solution (Well Sort of): I did a clean install of win 7 on a brand new Kingston HyperX Fury SSD installed my mobo drivers and used the WSUS Offline installer to get all the updates in one go (Selecting X64, VC and .NET, Security Essentials, Defender Definition updates & Service pack and selecting "Reboot and recall" and let it do it's thing, then I installed my GPU and Sound card drivers (Nvidia drivers need .NET on first or they will fail to install and on reboot I would get a cascade of "Access Violation" (0xc00000005) errors on all .exe's, leading to another reinstall of windows). Then I went to adding the Take Ownership option to my explorer right click menu with the .REG file I downloaded and removed that pesky DEP completely with a script in CMD (Ran as admin)

I also turned of UAC (don't do that unless you are sure you need to!) I did it as I was sick and tired of having to confirm every single program and game I ran!