Recently I discovered a bunch of .SQM files all over my hard drive and wondered what they were. After further research, I found that these files are created by the Customer Service Improvement Program feature in MSN Messenger. They are used to track bugs and errors with the system.

This feature can be disabled by selecting the Help menu in MSN Messenger and selecting Customer Service Improvement Program. Simply select I don’t want to participate right now and click OK.

Source: File Extension .SQM