That's great. Then just follow essential these steps:
- Turn on your laptop.
- When the Dell splash screen appears during the computer start-up process, press and hold Ctrl and then press F11. Then, release both keys at the same time.
- In the Dell PC Restore by Symantec window, click on Restore. Alternatively, press Tab to highlight Restore, and then press Enter.
You Windows 7 will become fine and then you can restore all your data from backup file. Try it.