We need more details!  :emotion-5:

What address book software is this? What version of Windows and what model PC? The more you tell us the more likely somebody will have a solution to the problem.

Ron

It is Microsoft Outlook .....XP....Dell  Dimension computer 2400 series

I don't use Outlook, but it sounds like the database for your contact list is damaged/corrupted. You'll have to poke around in Outlook to see if there's a repair feature that might fix the problem.  Microsoft Office products have their Repair feature under Help on the toolbar. 

If this doesn't help, and unless somebody responds here with a better idea, you may need to repost this in the Productivity Software forum.

Ron

thanks for your reply....I don't have Microsoft Office... so maybe I will put this question on the Productivity Software forum.

You don't need Microsoft Office to do what I suggested about looking for a Repair feature in Outlook.

All I meant was that in Microsoft Office the Repair feature is on the toolbar under the Help option. So just using that as an example, you might want to look in a similar place on the Outlook toolbar for Outlook's Repair  -assuming such a feature actually exists.

Ron