Windows 7 - .NET Framework Initialization Error

I want to begin by saying how stupid i am.
My computer was starting to get slow, and i did a power clean in it.
The thing is, i think i cleaned way too much.

Now some links are not working, for instance if i press properties in Computer, in start, it won't do anything. But if i search for system, it will open the same window.

Also, advanced system care is all crazy. The links there also won't work.
I have attached an image as an example. Aside from that, when i start it an error screen shows up, and asks if i want to continue, restart or abort.

I thought those were all DirectX problems, because i uninstalled it and i was going to install a new one. When i finished downloading the SDK, however, an error screen telling me to:
"Set the registry key HKLM/Software/Microsoft/.NETFramework/installroot to the .NET install location "

Also, if i press next, another error screen shows up saying errors were encountered during the installation of .NET Framework 2.0 . Error Code: S1023

First, i re-installed .NET Framework, nothing was fixed, and then i double checked the install root thingy, and everything was okay.


Also, i don't have any system restores or any kind of thing to recover from. Its really driving me crazy, i didn't even get to update the drivers.

Do a system repair with OS dvd.

Did not work. Also, now i can't open WMP, because it says server execution failed.

You may end up having to do a complete clean re-install. Question; is the hard drive making in weird noises. If so it could be going bad or some bad sectors on the disk.

Check your hard disk for errors

Oh hell, i hate formatting. I used to love it, because my PC never had a lot of things in it, and my PC always got faster. Oh well.

Managed to fix media player through iobit's win fix

Yeah baby yeah!
I fixed all of the problems!
All i had to do was:

-Run sfc /scannow
-Disable all Windows Features, except for Media Player and Search.
-Re-Register all the DLL's following this tutorial: Re-register all DLL files in windows system directory

YEAH!

Scratch that, i still have the framework error.

Hello Alex,

You might see if using the .NET Framework Cleanup Tool may be able to clean it up and get rid of the error for you.

Hope this helps,
Shawn

I don't know how to use that, because if .net Framework comes with windows 7, how am i supposed to uninstall it? and install it again?

You would just need to download the second "Download Location" item at the link above, extract the EXE file from the ZIP, and run the EXE file to run it.

Afterwards you can download and install .NET Framework 4.0 at the link below.

Download details: Microsoft .NET Framework 4 (Standalone Installer)