SymptomsYou are having problems with one-finger gestures in your Windows 8 Virtual Machine, including opening Windows 8 Charms Menu, switching applications or opening the Windows 8 Application Menu.
CauseWindows Gestures in Parallels Desktop for Mac are not reliant on where your cursor is placed on the screen but where you begin the gesture on your trackpad.
ResolutionGestures in Parallels Desktop for Mac start at the edge of the trackpad — the position of the cursor is not important. Please see the illustrations below for more detail:
Do not start the gesture in the middle of the trackpad:
Start the gesture at the edge of the trackpad: