Windows 8 Killed my SSDs
Solution 1:
Make sure you're running the latest firmware on your Crucial M4s. There is a well-known firmware bug that causes the drives to misbehave (causing BSODs in Windows) every hour or so, once the drives have hit 5184 power-on hours.
You can use a SMART diagnostic such as CrystalDiskInfo or smartmontools to check the power-on hours and see if you recently passed the magic number.
Crucial patched this bug in a January 2012 firmware update. The update leaves your data intact, but you should back up anything important first, even if it requires several 1-hour sessions and you have to do it in chunks.