Check to see if your anti-virus is active during the registration. If it isMcAfees VirusScan 8.0i, then you will need to disable the " Buffer Overflow "
function in the application. In addition to this, right click on My Computer and select
Properties.



Then click on the Advanced tab and under Performance click on
the Settings button. Click on the Data Execution Prevention tab. Select the Turn
on DEP for all programs and services except those I select. radio button and click
on Add. Navigate to "C:\Program Files\ Adobe\Adobe Photoshop CS2\Photoshop.exe" and click Open. Now click on Apply and then Ok. Restart the computer and try the registration process again.