I found this on the Dell website is it a good idea to try it and is it possible it will fix my problem?

To restore your computer to the original factory installation, follow these steps:
1. Turn on the computer, after the Dell logo press F8 key repeatedly until the
Advanced Boot Options menu (Advanced Startup Options).
2. In Advanced Boot Options, highlight Repair Your Computer and press Enter.
3. Click Next and logon to the administrator account in the computer.
4. Click Dell Factory Image Recovery and DataSafe Options; Follow the directions provided.