You may need to do the "Startup Repair" 3 or more times in a row before the system will boot successfully.
Warning Using the F8 Dell Factory restore feature on a Dell will wipe all your data. email, pictures, ect.
Dell does not actually make a "Recovery CD", usually it is a W7 re-installation DVD, you can boot from this DVD to run the startup repair.
**Do not Install W7 from this DVD, it will break the F8 Dell factory restore feature and it cannot be repaired.
I suggest trying the Startup Repair 3 or more times before using F8 Factory Restore.
Here is how you can back up your important data before doing the Factory Restore.