IE7 Access Violation

Can anyone help please? I have recently downloaded IE7. On occasions when I close the browser I get a notification which says (something like) "Access violation at address 01CB0200 in module "iesdsg.dll" Read of address 25202E67". It doesn't happen every time and doesn't seem to affect the way it works. What does it mean and do I need to do anything about it? Thanks as always.

Looks like iesdsg.dll belongs to Spyware doctor - http://www.file.net/process/iesdsg.dll.html - wasn't aware that I had ever had it on my computer. So guess it is not a serious fault - do you think I shouldtry to remove it - the alert card is irritating.