Losing Logitech webcam from MSN Messenger

I'm running Windows XPsp2, AOL9 and MSN Messenger 7.0 with a Dell installed Logitech webcam. Something has started to delete the webcam from the MSN site and the only way to get it back is to do a restore to a time before the problem began. I do update and run Norton virus and firewall, and AOL Spyware frequently and wonder if these could be the source of the trouble. Has anyone else had this problem ?

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