Additional log on information required keeps popping up.

Hi,

Whilst on the internet I keep getting the 'additional log on information required-click to open your browser' bubble popping up. When this happens it briefly disconnects me from the internet (it automatically reconnects within a few seconds) and sometimes when I turn my laptop on it will connect to the internet but wont allow me access to the internet.
I have had my laptop/internet service provider/modem for nearly a year but this problem has cropped up in the last few weeks!
I'm assuming that it is an update issue of some type as when I connect with my PS3 it stays connected with no interruption in connectivity at all.

I am using a wireless connection, my ISP is Vodafone Ireland and my modem is a black ZyXEL (P-66OHN-T1A) Eircom modem.

Any help will be greatly appreciated as this issue is intensely frustrating!

I just did the sfc/scannow and it found no integrity violations. I am using open DNS but I don't know how to change it!
I did get a windows update recently and the problem started soon afterwards. But, again, I dont know how to check what update it was or how to uninstall it or even how to restore to a previous save point!

Please excuse my absolute ignorance in relation to this! Im kind of lost!

p.s. i did a virus/maleware scan and everything is good in that dept.

followed the advise given by scr in the link:

Additional log on information may be required in notification tray

And i flushed my browser and DNS cache by following the instructions but the problem still persists.

Go to control panel==>Programs and features==>Installed updates==> look for KB2446708==>right click on it and uninstall it.

Just had a look there and I don't actually have the KB2446708 update!