I don't have it installed right now.
It's windows 7 Ult 32bits.
Steps to reproduce.
Install clean version of Windows 7
My test system requires video, LAN, and WIfi drivers to also be installed or updated.
Install Chrome browser, ensure both Chrome and IE work fine.
Enable Guest account, switch users to the guest account and again verify IE and Chrome browser work.
Back in the admin account install NIS 2013, update the product, rebooting as necessary until no more updates are availible.
Reboot into guest account, Chrome and IE no longer work.
Change into admin account, both browsers work fine.
change users back into the Guest account, both browsers do not work.
At this point I can tell there is a probem.
In my opinion, NIS using the default settings should not change the intended behavior or the Windows Guest account.
Then I uninstalled NIS 2013 using the option to remove all the data and declining the toolbar.
Reboot, verify the browsers work fine again in both user accounts.
From admin account, install NIS 2012, do all updates and reboots until it is current.
This time in the Guest account both browsers work fine, as intended with defualt settings, just like all previous versions of NIS.
Dave