XP Mode won't install

[JackBN]

I just built a new system with Windows 7 Professional, in order to have XP Mode along with W7:
Asus P8Z68-V, i7-2600K, Windows Pro 64-bit, Norton 360

Every time I try to download XP mode, I get:
"Windows validation required"
Then it goes to "Downloads Windows Activation Update."
It runs the update and says the system is already updated
It returns to "Windows validation required." Again and again.

I have tried Firefox and IE8. Same problem with both.
I just moved from Home Premium to Pro. I'm frustrated big time.

Could Norton have anything to do with the problem?

What's the solution?

 

[Nothinman]

Disabling you A/V should be simple enough to test. But there's got to be something stopping the activation ActiveX control from loading and verifying your copy of Windows. Maybe your IE security settings got turned up too high?

 

[JackBN]

Thanks.

I got up the nerve to disable Norton 360 -- problem solved.