My Dell E510 desktop keeps going back to the desktop when online. And sometimes the blue screen of death?

Hi pointyredthings,

I would suggest you to boot the system in Safe Mode with Networking and check if the issue occurs.

To boot the computer in Safe Mode with Networking, please switch on the computer and start tapping the F8 key which would take you to Advanced Boot Option screen. Using the up and down arrow key, select Safe Mode with Networking to boot the computer into Safe Mode with Networking.

If system works fine in Safe Mode with Networking then perform Clean Boot and then check if the system is working fine in normal mode, if so, then it can be an issue with some application or Software installed on the system.

Please use the link below for steps to perform Clean Boot:

http://bit.ly/12PfxI

Also, I would recommend you to perform a complete scan with the antivirus you are using on the system. To get more information on how to remove viruses and malware from the system, please refer to the link below:

http://dell.to/eSloV5

If the issue started few days back, you may also perfrom System Restore. To guide you through the steps of System Restore, use the link below:

http://dell.to/Qnh9Rx

Hope the information is useful in resolving your issue.

Thanks and Regards

Priyanka S