Today, a friend sent a computer saying that a program can't run and can't be opened all the time.

I tried to click Run, and the result showed the following error prompt, saying that net 4.0 component is needed, which is not easy. I downloaded the software immediately, and the result showed an error, so I couldn't install it.

Net 4.0 prompt required

Error hint

Baidu quickly found that friends had installed. Net 4.0 before, which took a long time, did not wait patiently, forced to close, resulting in the installation failure, that is, the patch installation file is damaged, and if you know the reason, you can solve it.

The following content comes from the Internet and is collected for yourself (there are many solutions on the Internet, only this one is the most effective

1. Start run enter CMD enter enter net stop wuauserv? (stop Windows Update service, otherwise the following folder cannot be renamed, indicating that it is running.)

2. Start run enter% windir% (usually C: Windows)

3. Find a folder called softwaredistribution, rename it (any name that is not duplicate with other folders), or delete it directly. (restart update service)

4. Start run input CMD enter input net start wuauserv in the open window

Next, run the. Net 4.0 setup program, and everything goes well.