Enable TRIM
Go to the Command Prompt and type:
fsutil behavior set disabledeletenotify 0
Disable TRIM
Go to the Command Prompt and type:
fsutil behavior set disabledeletenotify 1
How do I know if TRIM is working in Windows 7?
Go to the Command Prompt and type:
fsutil behavior query disabledeletenotify
DisableDeleteNotify = 1 (Windows TRIM commands are disabled)
DisableDeleteNotify = 0 (Windows TRIM commands are enabled)