Desktop Page Flashing

I have hp pavilion g6-2249 wm notebook. My laptop is 4 months old. Two days ago when I started my
pc, the welcome page opens and then I sign in. Everything is ok on the apps page that immediately opens.
If I click the desktop app icon, it goes to the desktop and the entire page starts to flash, it shows the desktop
for 2 seconds and then then flashes to blue for 5 seconds and back and forth, etc.

The desktop will not stay open long enough for me to do anything. I cannot get it to start in safe mode. I clicked
F8 repeatedly on start up but nothing happens. I used the esc on startup and ran every test offered except BIOS.
I don't know what to do with that so I didn't mess with it. All tests were ok.

If I go back to the app page from the flashing desktop, the app page and charms start flashing also. I can't even
shut down properly then. Norton 360 runs in the background all the time but I can't get to it to do a scan. I
can't get to any file. The only way to get online is to turn off pc and turn on later. App page does not flash at
that time. I go to search and click on Explorer and I can go to my homepage. If I click on required addons then
the background starts flashing and I have to reset my cursor every two letter that I type. I am going crazy.
Can someone help me???
Thanks

If you can do this, you can get to Safe Mode:

Windows key + C.
Settings
Power
Hold shift key and click RESTART.
then you have all the options.

Click on Advanced Options then Startup Settings.
Click Restart and you have almost the full advanced Boot Options menu like XP, Vista or Win 7.

You mean, the Windows are opening and closing rapidly and randomly? How about the taskbar, does that flash too?

It may be a Program that is loading on Startup, try to get into Safe Mode, and post a list of the Programs that are in the Startup area of Task Manager. Also, someone else has had Problems with Norton, it appears to not be very friendly with Windows 8.1, a possible non compatibility.

When I open Quicken, it does the exact same thing when I try to Sync to the Cloud. It makes it impossible to do anything else until it is done syncing.

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 : )

SafeMSI ... very nice. Will have to try it some time.