Serious error Microsoft.NET Framework 4.0 installation

First step:

If it's an XP system, do this:

1. Start-run-Enter cmd--return-enter net stop WuAuServ in the open window

2. Start-run-input%windir%

3. There is a folder called SoftwareDistribution in the open window, renaming it to Sdold

4. Start-run-Enter cmd--return-enter net start in open window WuAuServ

Step Two:

1. Start-run-input regedit--carriage return

2. Find the registry, Hkey_local_machinesofwaremicrosoftinternet Explorer under the main subkey, click Main, in the menu above to find "edit"-"permission", click will appear "Allow Full Control" And so on, on the hook can be. The reason for this situation, mainly with the ghost system, there are many systems of IE to kidnap.

Step Three:

Install net.framework4.0