Invisible Cursor ("Additional login info required...")

Gents. Upon starting Parallels and my windows 7 installation I get a warning on the bottom left hand corner with a yield sign and some kind of icon that states:

Additional log on information may be required, click to open your browser.

This results in an INVISIBLE cursor and a LOCKUP which makes the computer unusable. I have to then MANUALLY shutdown my computer.

Please advise if at all possible.