SSD not recognized by windows

Have you ran WEI?

After WEI, the test results will let Windows know more of whats going on. At that point, Defrag will be disabled on drives that are SSDs, and it may also disable Superfetch. I would also turn off the drive indexing on the SSD. It is not needed. But you can leave it on for the spinning drives if you so choose.
(I would turn SF back on though if it were me. The writes it does do are insignificant, and SF still benefits SSDs. RAM is still faster)

Windows Defrag is BAD though. if you wish to defrag a SSd on occasion, only use something like Perfect Disk Consolodate or Disk Keeper Hyperfast. They can help a bit if used in moderation (once or twice a month) and are designed for SSDs.
These are the only 2 Im aware of however that are safe.

TRIM should be supported for the SSd with Win7s default AHCI driver, as well as the newer Intel drivers.

Here yo go mate. This will show you how to update your WEI score. :)

Windows Experience Index - Update or Refresh Score

Samuel,

Did you already update all of the drivers from here?

SSD not recognized by windows

Yes I've updated the drivers, is that a mistake? Should I have ran this WEI with default win driver first?

No, you would have wanted to updated those drivers.

Not sure why Windows 7 didn't automatically turn of Disk Defrag for your SSD then, but you can always just manually turn it off yourself by unchecking the SSD in the Disk Defrag Schedule settings. Plus, not to select it when you defrag the other drives.

Windows 7 will do the TRIM for you since your SSD supports it in Windows 7. No need to do anything else for TRIM. :)