System error How to do, can only reinstall the system, in fact, we can take the System Restore function, this tutorial for you to introduce the Win7 system in the Restore function, let's look at the concrete operation.
Tool material
Windows7
Step method
Right-click the computer icon on the desktop, select Properties, open the System window
In the left pane of the System window, select the System Protection tab
In the System Properties dialog box, select the drive in which you want to turn on the restore point setting, and click the Configure button
If you want to turn on the ability to restore system settings and previous versions of files, select Restore system settings and previous versions of files, and if you want to turn on the ability to restore previous versions of files, select Restore only previous versions of files
In the System Properties-System Protection dialog box, select the drive in which you want to turn on the restore point setting, and click the Create button
Type a restore name to help you identify the description of the restore point and click "Create".