It may have been the TRIM Windows update for your SSD. You should go to
intel site Here and run the firmware update tool to make sure your SSD is up to date. Some of the intel SSD's have errors with TRIM and other firmware issues, so making sure your firmware is up to date will eliminate some of those issues and give us a better idea of the problem.
Sounds like the diagnostic tools listed here are for conventional HDD's. You should run the
Intel SSD Toolbox for your SSD after updating your firmware if you are still having issues.