Hi,
Run the Dell Diagnostics and the other methods that would assist you.
"This article describes troubleshooting computers that are powering up correctly and passing the Dell BIOS screen at boot-up, but do not successfully boot to Microsoft Windows"
http://www.dell.com/support/troubleshooting/us/en/19/KCS/KcsArticles/ArticleView?docid=266423
Table of Contents:
- Verify the Computer Finishes Initial Power-Up (POST)
- Check for Specific Error Messages
- Run a Computer Diagnostic
- Rest the BIOS to Default Values
- Boot the Computer into Safe Mode
- Check for Recent Changes
- Unplug All External Devices
- Use Startup Repair to Restore Critical Windows Files
- Use System Restore to Revert to a Previous State
- Use Clean-Boot Troubleshooting to Isolate the Software Issue
- Virus and Malware Troubleshooting
- Restore the Operating System to Factory Settings
Cheers.