On your machine at work,
right click on My Computer and Choose Properties.
Click on the Hardware tab, then on the Device Manager button.
Click the + beside IDE ATA/ATAPI Controllers.
Double click on the Storage Controllers item (this may say Intel something Storage Controller or something similiar).
Click on the Driver tab and check to see what name is beside the Driver Provider.
I suspect this says Microsoft. This is the generic Windows XP driver that ususally gets installed on upgraded machines. It works because it is generic and will work with almost any IDE storage controller, but it is not efficient or fast. If it is the Microsoft one you will need help from your hardware vendor to find, download and install the proper manufacturers IDE driver and you will see a dramatic increase in speed. It would be interesting to check out your home machine and see what driver it is using.