Computer freeze

I have Vista, I downloaded Comodo, however, while performing a virus check or opening the downloads option a white box appears in the middle of the screen and my computer freezes. Anyone have a solution?

Do you have other security programs running in the background that could interfere? Try disabling them.

Can you take a look at the D+ logs, see if there is a clue there and post a screenshot of them. They are under Defense + -->Common Tasks → View Defense + Events.