Welcome to Dell community.
In response to your query, you can surely do a system restore to an earlier restore point, this will not make any changes to the data on the computer but will make changes to the recently installed software. Coming to the PC restore, yes if you have an option to do a PC restore with the recovery partition available on the computer, you can surely perform it & this will take the computer to the factory defaults (factory image restore) with all the data getting deleted, hence before doing a PC restore it is recommended to back up all the data.
Find below the links which will guide you through the steps to perform PC restore & System restore.
Let us know if this helps.
Thanks & regards
Dell Social Media Responder
Using the Dell Backup and Recovery Manager
|Dell OptiPlex, Latitude, and Precisions use Dell Backup and Recovery Manager as of May 26, 2009
If you have an OptiPlex, Latitude, Vostro, or Precision that you purchased before May 26, 2009 Click here for Restore and Reinstall information.
|Section 1:||Creating a Full System Backup|
|Section 2:||Restoring from a Backup|
|Section 3:||Restoring your System to the Factory Image|
For instructions on how to restore to a Factory Image, refer to the latest version of the Dell Backup and Recovery Manager User's Guide, under the section Restoring your system from the Windows Recovery Environment.
|Section 4:||Creating System Recovery Disks|