Solve xp can not install NET Framework4.0

First Step:

If it is an XP system: 1. Start ——Run ——Enter cmd——Enter —— Enter net stop WuAuServ2 in the window. Start ——Run ——Enter %windir%3. In the window that opens, there is a folder called SoftwareDistribution, rename it to SDold4. Start ——Run — —Enter cmd——Enter —— Enter net start in the window that opens WuAuServ Step 2: Start ——Run ——Enter regedit——Enter 2.Find the registry , MKEY_LOCAL_MACHINE\\SOFWARE\\Microsoft\\Internet Explorer MAIN sub-key, click on the main, in the above menu, find "Edit" & rdquo;--&" permissions”, click will appear "Allow full control", etc. The words can be checked. The reason for this situation is mainly the system done with ghost. There are many systems that kidnap IE. Step 3: Install Net.Framework4.0