Run F12 preboot diagnostics:

http://dellwindowsreinstallationguide.com/f12-preboot-diagnostics/

Model of Dell?

How can I just restore to factory settings. becasue before i can even try any of those thingsu suggested the blue screen come on so i cant accomplish nothing. It dont have the disk to it to reinstll windows vista when i bought it and i cant find anywhere on the comp to create them.  And i dont have money to buy a driver detective software. 

I am running diagnostic test.  Dont u think it would be easier to set back to facotry settings?  It wont let me do that either. I go to F8 and than click on repair computor than it dont ask to log in as administrator it says username and password i have no password on it  so I cannot go no futher than that. And it didnt come with no dfisks of windows vista and i cant find where to create them. 

No point in going back to factory settings unless the diagnostics pass. If the hardware is good then you can diagnose the software issue.

Both Dell DataSafe Local Backup and Windows Vista are obsolete. What is the model of Dell e.g. Insprion 1525?

I would advise taking the unofficial path to Windows 10 using the Windows 10130 .iso see here:

http://dellwindowsreinstallationguide.com/windows-xpvista-%e2%86%92-windows-10-free-upgrade/