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#11
On a SSD, trim must be enabled:
Type this cmd
fsutil behavior query DisableDeleteNotify
It will give you one of two results, either a 0 or a 1. A zero indicates that TRIM is enabled correctly, a one means that it is not. If you have a TRIM-compatible SSD, but find that Windows 7 hasn't enabled the command, you can easily do so by running this command:
fsutil behavior set DisableDeleteNotify 0