Cleaning internet history off of laptop

I have a laptop for work that I keep at home. I sometimes vpn into my office for work, but mostly use it for personal use. They want me to bring it into the office to install MS Active Directory. If I erase my downloads and clear the history and cookies, would they be able to tell the websites I visited? I use netscape Flock and it has a “clear personal data” option that I used.

You might also want to clear your temp area:

[ol]
[li]Click Start / Run.[/li][li]Enter %temp% in the box & hit enter.[/li][li]Select everything in the window that appears (Ctrl-A).[/li][li]Hit Delete.[/li][li]Close the window when done.[/li][li]Empty your recycle bin.[/li][/ol]