Windows 8.1 flickers between Start up Screen to Desktop

After start-up and when I click on the desktop tile, my windows 8.1 HP Envy laptop flickers between the Start up screen with all the tiles to the desktop then to a blue screen then back to the Start up Screen with all the tile and so on.

Can't seem to get off that merry go-round. HP Tech support has me hitting the F11 key to get me to recovery manager so I can back up my files.

Any suggestions?

My 8.0 laptop does the same thing. I have been told it is from 2 trojans and hundreds of corrupt files. I have been trying to reset to factory but it will not work.

I had this same frustrating issue & this was how I resolved it.

1. Since the flashing screen couldn't allow me restart my PC in safe mode, I pressed the power button to force a shut down.
2. I pressed the power button to start up and pressed the power button again after 2 secs to create an unusual shutdown.
3. On next attempt to start up (by pressing power button again), Windows tried to repair startup so I could now boot into safe mode with networking.
4. I already realised the flashing issue had to do with my Norton 360 installation so I had to find a way to properly uninstall it.
5. I Googled "Norton_Removal_Tool" from Norton and downloaded it.
6. Since safe mode wouldn't normally allow installations, I downloaded "SafeMSI" to enable me install/unistall in safe mode.
7. After running "Safe MSI", I installed "Norton_Removal_Tool" to remove all Norton products/services.
8. The above action demanded a restart which I obliged to.
9. Non essential step: I ran Malwarebytes to confirm that all is alright & switched to a new antivirus.
10. My PC is back and happy again : )