I'm doing a trial run with Wormguard and everything seems to be going well. One oddity occurred when I ran Speed Disk (a defragmenter/optimizer). When I clicked on Speed Disk a SDNT.exe file with 0 bytes popped up on my desktop. This happened more than once. Speed Disk ran fine and did its job. I deleted the SDNT.exe files without it removing the SDNT.exe file from within Norton Utilities in Explorer. This event has never happened before installing Wormguard. I'm not even sure if it is related to Wormguard, because Wormguard did not pop-up with any kind of alert.