Outlook XP Prompts Message

After installing of OfficeXP SP3, whenever i want to compose a new mail, this message popping up…

“A program is trying to access e-mail addresses you have stored in Outlook. Do you want to allowo this?

If this is unexpected, it may be a virus and you should choose “No”….”

Default button got 2 – Yes or No. Hence, i can either select Yes or No.

Please assist me.