Automatic update failure in win7

The problem that Windows 7 cannot be automatically updated is that after entering Windows 7 today, if you want to update the system, but click "Auto Update", it will appear:
Windows update cannot check for updates. Because the service is not running, you may need to restart your computer.
Depressed! First, check the corresponding Update Service:
Computer -- Management -- service -- windows update found to be "started. So I click "restart" to restart the service, but the problem persists. Then wandering online, finally here http://zhidao.baidu.com/question/398896728.html found a solution: Open the Command Prompt window as administrator, run the following command: www.2cto.com net stop WuAuServcd % windir % ren SoftwareDistribution SDoldnet start WuAuServ do not need to be restarted, click Windows Update, OK!
This problem occurs because I accidentally deleted the files in the SoftwareDistribution folder when I cleaned the drive C a few days ago. Author: silverzhaojr