As per Daily Tech a major bug has been found in Windows 7's RTM build 7600.16385. As per the Daily Tech post - When scanning a second hard disk (a non-boot partition or second physical drive) using the "/r" (read and verify all file data) parameter the utility starts to leak memory and quickly runs up a high enough memory debt that it blue screens and crashes the system.
The bug is a memory leak that is triggered when people use Microsoft's ole classic: the CHKDSK command, on a hard drive that doesn't have your boot partition on it. The bug will only be triggered if you use the "/r" command, which is the "read and verify all data" parameter.
The bug effects both 32-bit and 64-bit versions.