adult sites appearing in my history!!!

now I know what your already thinking, but hear me out before you judge me.:D:D:D

My boss blamed a few of us for looking at porn on his PC, cos it was in his history. I knew I hadnt, and I didnt think anyone else in the office would of either, so I checked it out.

As soon as i go online, i check the history, it shows up porntube site. (which i do love, but certainly not at work ;-) ) anyway, right click the site in his history, and go to properties. this will shows the last time I supposedly looked at this site.

I went on his PC this morning, clicked internet, opened home page, (google) at 10.41am then i checked history, it says i was on porntube at 10.41 am this morning.

As I said, im not gonna lie and say i dont like porn, but not in a million years in work, and certainly not on my bosses PC!! its very funny actually.


Anyway, Ive run anti virus, spyware etc, but to no avail, Sophos cant find anything, anyone else had this problem?