First, the service package of Win7 SP 1 cannot be installed. The reason is that in the system cleaning function of Windows7 Optimizer, the system slimming function lists the items that drive backup. If you choose to clean up these driver backups during slimming, it will lead to the problem that Windows7 SP 1 cannot be installed during online installation or upgrade, suggesting that the system lacks necessary components. Second, the Wind7 SP 1 service pack cannot be installed. Solution Step 1: Download the deleted driver backup file and decompress the driver backup in the slimming function. Some folders in the folder C: \ Windows \ System32 \ DriverStore \ File Repository have been deleted. We have packed and downloaded this folder, please decompress it first. If you don't know whether your system is 32-bit or 64-bit, please right-click the computer in the start menu and view the system properties. 32-bit Windows 7:Down/Windows 7/ File Repository (x86)/Windows 7/ File Repository (x64). Rar Step 2: Restore the deleted file 1 and obtain the administrator rights of the target folder. First, open the beautifier in the Rubik's Cube, click "right-click menu customization" above, then click "add right-click menu item" on the left and check the right. In this way, when you right-click on a file or folder, there will be an extra item "Administrator takes ownership" in the menu. If you log in directly as the user administrator, you can omit this step. Then, open a browser and open the folder C: \ Windows \ System32 \ Driver Store \. Right-click the FileRepository folder, and then click "Administrator takes ownership" on the menu. At this time, a command line window will pop up and continue to perform operations. You can wait patiently for dozens of seconds until the command line window closes automatically. 2. The folder restore operation will copy or cut all the contents of the FileRepository in the file you just extracted and paste it into the folder C: \ Windows \ System32 \ DriverStore \ File repository. If you are prompted to overwrite files, etc. Click OK all the way, as shown below: After all these folders are pasted successfully, it is finished. If you still encounter the problem of insufficient prompt permission, do not close the prompt window. You can regain administrator rights for the folder c: \ Windows \ System32 \ DriverStore \ File Repository, and then click Retry. Or you can right-click this folder-Properties, click the Security tab, click the Edit button, manually add the permissions of your current Windows user name, set it to full control, and then click Retry the file copy operation. Users who can't install Win7 SP 1 service pack are basically caused by using the slimming function in Win7 optimization master. According to what the author said above, the problem that Win7 SP 1 service pack cannot be installed should be solved satisfactorily.