Actually there are three types of hard drives around now that are popular.
The standard IDE drive, SCSI and Serial ATA(IDE). A three year old computer
probably has a standard IDE drive in it unless pretty big bucks were paid
for a SCSI drive. The easiest way to check is to start Device manager.

Right click My Computer, left click Manage, left click Device Manager. On
the right side of the screen click the + next to Disk Drives. One at a
time, right click on each drive shown there and then left click Properties
then click on details tab. This will tell you whether the device is an IDE,
USB, SCSI, etc. as the first part of the details.

Hope this helps.

"Computer Man" <ComputerMan@discussions.microsoft.com> wrote in message
news:CF1A5E4E-DE95-45F7-90FB-FD87DAF1CA24@microsoft.com...
> Hi there. I want to add a second hard drive. Installation doesn't seem to
> be
> too hard, I've been visiting a few sites that offer help with hard drive
> installation. My problem is this. There are I beleive two types of HD. IDE
> &
> SCSI. My PC is three years old, ADVENT3307 What type of HD should I fit?
> --
> Thanks Man
>