The updated Intel driver is here: Intel Rapid Storage Technology.
To check trim, do this: a clip from the article "SSD Support is Native to W7"
...From the get-go, Windows 7 will take advantage of a SSD/TRIM-enabled drive and configure it for you. While I personally disable the pagefile entirely, those who still use it will benefit significantly by keeping it on your SSD.
To determine if your SSD supports TRIM, open a console as Admin;
fsutil behavior query DisableDeleteNotify
If the console returns a '0', your drive supports TRIM and it is ENABLED.
If it returns '1', the file system has disabled TRIM for your drive. This means your drive's controller does not support TRIM.
A firmware upgrade may correct the problem as more and more SSD manufacturers are now implementing this essential feature in the form of BIOS updates for older drives and natively in new drives. Check your drive's site for possible upgrades. While, forcing TRIM is possible, it is not recommended.
To do this: start/all programs/accessories/command prompt/right click/choose run as administrator.
It'll open a "DOS" window, type in the command (in bold above)...
Also, since you have an OCZ SSD, download "Garbage Collection" from the OCZ website here: All OCZ Indilinx-Based SSDs
It's a "clean up" utility for you SSD. But is doesn't run as a background application, as TRIM does.