See if trim is enabled in windows7 Command prompt disabledeletenotify fsutil

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:

C:\Windows\system32>fsutil
---- Commands Supported ----

8dot3name       8dot3name managment
behavior        Control file system behavior
dirty           Manage volume dirty bit
file            File specific commands
fsinfo          File system information
hardlink        Hardlink management
objectid        Object ID management
quota           Quota management
repair          Self healing management
reparsepoint    Reparse point management
resource        Transactional Resource Manager management
sparse          Sparse file control
transaction     Transaction management
usn             USN management
volume          Volume management

C:\Windows\system32>fsutil behavior query disabledeletenotify
DisableDeleteNotify = 0