How to fix the XP system cannot install net Framework4.0?

The first step:

If it is an XP system:

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

2. Start-run-enter%windir%

3. In the open window there is a folder called SoftwareDistribution, rename it to Sdold

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

Step Two:

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

2. Find the registry, the main sub-key under Hkey_local_machine\sofware\microsoft\internet Explorer, click on Main, in the menu above to find "edit"-"Permissions", click will appear " Allow Full Control "such as the words, tick on the can. The reason for this situation, mainly with ghost to do the system, there are many systems to the internet to kidnap ie.

Step Three:

Installing net.framework4.0

How to fix the XP system cannot install net Framework4.0?