Lot of times you get this error with dealing with the web page in which you got to log in. For example.
www.yahoomail.com... etc.
To solve this problem.
Check your system date in your computer and fix it. Lot of times you fix this error by just by fixing the date of the computer.
If not, reset your internet explorer.
if not go to tools.. then to the manage add ones... try enabling and disabling the add ones.
these are only the solution. 95% of this kind of problems are solved by following the above steps.
Take care. bye
Have fun.
Shaswat Paudel