To back up and restore IIS 6:

1. Open the IIS Manager.
2. Right-click the machine labeled as Local Computer.
3. Click All Tasks > Backup/Restore Configuration > Create Backup.

   

4. Type a name for the backed up configuration and then click OK.

   

5. Click Close.
6. Open the %windir%\system32\inetsrv\MetaBack directory and copy the created backup to a local folder.

   

7. Reinstall IIS.
8. Open the local folder and copy the backup file to the %windir%\system32\inetsrv\MetaBack directory.
9. Open the IIS Manager.
10. Right-click the machine labeled as Local computer.
11. Click All Tasks > Backup/Restore Configuration.
12. Select the backup name and then click Restore > Yes > OK.
13. Click Close.

To back up and restore IIS 7 or IIS 8:

1. Open cmd.exe.
2. Navigate to %windir%\system32\inetsrv\.
3. Execute following command to back up configuration:

   appcmd.exe add backup <backupname>.

4. Open the %windir%\system32\inetsrv\backup directory and copy the backup folder to a local folder.
5. Reinstall IIS.
6. Open the local folder and copy the backup folder to the %windir%\system32\inetsrv\backup directory.
7. Execute following command to back up configuration:

   appcmd.exe restore backup <backupname>