Slow startup and multiple Norton icons

Hiya,

 

I've been using Norton Internet Security for a couple of years now with no issues. Lately, I've noticed a massive slow-down on Windows startup. I'm on Windows 7 Home Premium 64bit. When booting the PC, it hangs with a solid disk light for up to 20 mins being totally unresponsive. I've disabled Boot Time Protection and tried uninstalling (via the Norton Removal Tool) and re-installing (twice now) and also have run the support tool which finds no issues. I have even tried a boot defragment via Norton Utilities with no luck. Hard drive has been CHKDSK'd and found no errors. It's definitely Norton causing the issue because Windows runs fine when it's uninstalled.

To top it off, this morning I've booted my machine to fiund two Norton icons on the task-bar!

 

Has anyone encountered this and been able to resolve these issues?

 

Cheers.

EDIT: I found a thread on the twin icon issue that suggested setting boot time scan to aggressive. I have tried that and it resolved the icon issue but boot times remain the same.