All,I'm running Win 7 Ultimate x64 on a desktop with the OS loaded on an Intel 160GB G2 SSD as C:. I've noticed that Defrag is happening on the SSD drive. I've confirmed this in two ways: First, looking at the Last Run date in the Disk Defragmenter UI. The date associated with the SSD drive C: continues to move forward. Second, I've looked in the event log and have confirmed that there are messages stating the successful defragmentation on the C: drive. I have 3 drives in my system. The SSD drive is C:. I have 2 WD 750GB drives as D: and E:. If I look at the Defragmentation Schedule UI, only drive D: and E: appear. I believe that means that the OS does recognize the drive as an SSD. Just to be safe I turned off Scheduled Defragmentation and Defragmentation has stopped on D: and E: but continues on C:.Looking at the event log, there seems to be no discernable pattern as to when the defrag happens on the SSD:12/19 12:15pm12/17 9:49pm12/16 7:13pm12/15 11:13pm12/14 10:33pm...I can't find any place to stop Defragmentation from happening on C:. Any suggestions?Thanks<!-- google_ad_section_end -->

You can change the schedule, its in the control panel. Or you can open the defragger from the accessories and modify the schedule there. Vote if answered or helpful, I am running for Office (joke)! IT/Developer, Windows/Linux/Mainframe Server: ASRock P4-2GHz, 1.5 GB RAM, Linux Server, need IDE/SATA disks for my chess site Workstation: Asus M2NBP-VM CSM, Athlon64 X2 4200+ 65W CPU, 2GB RAM, NVIDIA 8600GT, 320GB + 160G backup, Windows 7 Ultimate x64.

Thanks for the reply, but i've turned off the defrag schedule. While it stopped defrag on the normal drives, the SSD drive C: is still being defraged. Is there somewhere else I can turn this completely off?Thansk

Might not help, but it was an interesting article regarding Windows 7 and SSD driveshttp://apcmag.com/windows_7_gets_ssdfriendly.htmMCSE, MCSA, MCDST [If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.]

I believe I found the culprit... It turns out that Norton Internet Security has a defragmentation program that runs on the boot volume. For those interested, the exact setting is: Idle Time Optimizer. I disabled this feature. Thanks

All the more reason people should tell us what 3rd party programs they have installed ;-) since you never mentioned it in your problem descriptionMCSE, MCSA, MCDST [If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.]