Since updating my xp machine with service pack 2 I've run into the follow problem:

Whenever I try to do someting beyond browsing in windows explorer I get a DEP (Data Execution Prevention) error. I am able to complete the task and then explorer is closed down. For instance, sharing a folder will create this action immediately while creating a new folder will sometimes create the problem and other times not. Anyone have any thoughts? I am not even sure what else to ask or provide.

Thanks.