Ok, well to reset the password ***** will have to undergo a series of steps, which may or may not be complex depending on your computer skill level.
Here's what you will need to do, from your co-worker's computer. You will also need a blank CD.
Click on the following link to get HBCD (Hiren's Boot CD):http://www.hirensbootcd.org/download/
Scroll down and click where it says Hirens.BootCD.15.2.zip
to download the file.
You need to burn it on to a CD which will then allow you to use it as a boot disk.
Once you've made the CD, you need to boot from it and boot into the MiniXP environment.
From there you will have the option to do all sorts of things, one of them being a password ***** of any account on the system.
Here's a video showing you how to reset the Windows password:http://goo.gl/TKVqC5
Once the password ***** been reset, you simply restart, remove the CD, and login with the newly created password.