If the Iarge works for other VMs, your Crucial M4 SSD has an issue. Update the Firmware and test it with a diag tool from Crucial. I`m sure it is not caused by nlsX86cc beacause i tried with a clean and non 3rd driver and any software installtion, it still happend. I`ll try a crucial scan when back. ----------------------------------------------------- the firmware is the newest. Couldn`t find the offical diag tool,use the hd tune pro, no error found. Tried to use the offical cmd tool perform a force firmware refresh, then perform a chkdsk and sfc scan, reboot, nothing changed.