This release of CCleaner causes a NTVDM lockup under Windows 7 with the Cleaner in monitor mode. Disabling monitoring restores NTVDM operations. One of my users loaded on their laptop and it killed the client app. It appears when CCleaner monitor fails no apps requiring NTVDM will run. Notice the icon indicating monitor active but could not select the icon to exit the monitor instance. Had to disable monitoring from CCleaner monitoring menu and reboot the laptop.