fsutil behavior query disabledeletenotify
Just compare your results with the results given below to check whether TRIM Support is enabled or not.
DisableDeleteNotify = 1 = TRIM support disabled
DisableDeleteNotify = 0 = TRIM support enabled
To Enable TRIM Support for SSDs, enter the below command in a command prompt.
fsutil behavior set disabledeletenotify 0
To Disable TRIM Support for SSDs, enter the below command in a command prompt.
fsutil behavior set disabledeletenotify 1