Calling I.T. experts

[putty]

Firstly I have been daft. I thought that viewing videos or photos on my lap top direct from a USB memory stick would not leave evidence of those clips and photos on the hard drive.
The lap top is a company one. I had been using it whilst travelling.
In Internet Explorer history I did find a record of them which I deleted via Internet options - browsing history.
Do you know if evidence of the photos and clips will be anywhere else in the computer? Idid do a saerch for photos and Videos and nothing untoward came up.If ther is a record of them any where else how to get rid of them? I'm sure our IT technicians or HR will not approve of my masochistic interests.
cheers putty