See this page for instructions on checking if TRIM is enabled in Windows 7 (use the fsutil method):
Verify That TRIM Is Enabled In Windows 7 | gHacks Technology News
About Samsung "Magician", it purposely interferes with sleep and should NEVER be left running. It's easy to miss, hidden in the notification area as it will be when you close the program. (That's why the default should be "always show" for new icons.) I wrote about the BSOD it caused me here, which was the first BSOD I've seen in several years:
It was a strange day - BSOD, Samsung Magician, Intel RST, hybrid sleep... - [H]ard|Forum
After you finish with it, visit the system tray and close it through its icon. It does not install drivers or leave any services running, so it's safe to use as long as you remember to close it for real. Here are a couple of supporting messages about Magician and sleep, both occurring in threads where people discuss BSODs and attribute it to "Magician":
[SOLVED] ntoskrnl.exe - Tech Support Forum
Samsung SSD Magician - Overclockers UK Forums
Now if you take the Samsung claims about sleep seriously, I'd recommend secure-erasing the drive and exchanging it for something else.
The only reason I have to run Magician is to use its optimizer function, which does a manual TRIM, which I find necessary to do immediately after encrypting a system drive with TrueCrypt. While TrueCrypt doesn't block TRIM on partitions within the scope of system encryption, it doesn't appear to generate any TRIM commands when encrypting a system drive. That is, after doing the system encryption, hours later, I can boot into Parted Magic and examine the disk outside of TrueCrypt with the supplied hex editor. I've found Samsung, Intel, and Crucial drives to be fully filled with gibberish, whereas if TRIM had run, they would contain vast swaths of zeroed sectors. Booting back into Windows, running the Samsung and Intel optimizers on their respective drives, and redoing the Parted Magic test, I find the expected zeroed sectors amidst the encrypted gibberish. Unfortunately, Crucial provides no such software, and the Intel and Samsung programs won't work on Crucial drives, but I achieved the same effect on my M500 using the Sysinternals sdelete to wipe free space.
