Win7 registry shell file accidentally deleted how to deal with?

Many people may not know what the registry is? But the database is clear to everyone. The registry is a new core database that Microsoft introduced from the Windous system to replace the original Win32 system file .ini file and manage the configuration system operating parameters. That is, the registry is a database. The registry is a very important part of Win7. Someone accidentally deleted the shell file, which caused the file to fail to open. Then how can we do it

Method One:? Before

Delete shell file, if win7 system registry had been backed up, or been on win7 system If you are backing up, you can restore the system directly or import the registry into existing data.

Method 2:

If you do not back up the registry or back up the Win7 system, you will need to reinstall the system.

In summary, any data needs to be saved. It is best to do a backup just in case. Especially for financial, data analysis personnel.