Please help

Are there any traces left on a computer of the time and date websites were
visited, other than the time stamp left by the local machine.



I know this is confusing so let me explain.



If someone changed the clock on a computer to a time and date when another
employee was using the computer. Then the person accesses pornographic
material leaving hundreds of temporary internet files and cookies on the
computer for the boss to see. I need to know if there is any way to tell if
the clock was changed while those porn sites were accessed.

There is no server or router used with this computer.



Will someone please help because a good man's career and family is at stake
here! \