Chrome and Firefox browser problems

I've been using both Firebox and Chrome for years without fail until recently.  Now after I run my NU 16 weekly system checkup both browsers won't open properly and can't access any webpages.

Has anyone encountered this issue or found a solution to this problem?  Please help

Now I have to reinstall Chrome after running my weekly NU 16 and NIS checkups to make each browser work again.  That's crazy.

Should I reconfigure NIS or NU 16 somehow?  What am I missing here?

OS: Win 7 Pro, Intel I7