Hi,
I'm using Win 7 Pro x64 SP1 and Norton Internet Security 2012 version 19.8.0.14. Recently NIS keeps displaying the "Threats Dectected" window but it is empty:

If I click on Apply All nothing happens, if I click on Close then this dialogue appears:

I have no choice but to click on Yes to close this window.
It seems that this window appears randomly. I have run a Full System Scan but the problem is still there.
Thanks for any help.
I just manually ran LiveUpdate few minutes ago:

And scan result of AutoFix:

Hi,
I'm using Win 7 Pro x64 SP1 and Norton Internet Security 2012 version 19.8.0.14. Recently NIS keeps displaying the "Threats Dectected" window but it is empty:

If I click on Apply All nothing happens, if I click on Close then this dialogue appears:

I have no choice but to click on Yes to close this window.
It seems that this window appears randomly. I have run a Full System Scan but the problem is still there.
Thanks for any help.
If this still is happening, I would suggest reinstalling your NIS using the Norton Removal and Reinstall Tool.
Download the Norton Removal and Reinstall Tool from here www.norton.com/nrnr
If you use Identity Safe, backup/export your data.
Run the Norton Removal and Reinstall Tool.
Reboot.
Run LiveUpdate manually a few times, rebooting as necessary, until no updates are available.
Import your Identity Safe data.
Please let us know how you get on.
I have run the tool you provided, then run LiveUpdate and QuickScan. However I need 2 or 3 days to confirm if everything is OK.
It has been 2 days since I removed & reinstalled NIS and now the program behaves normally, no empty "Thread Detected" window. So I guess the problem is solved. Thank you peterweb.
Glad to hear you found a solution.
We are here if you need us.