Context: in memoQ, you can't use the AutoPick feature. When you press CTRL, your mouse pointer shows circles, and no list is displayed.
Fix: this problem is due to a conflict between the default key used by memoQ for AutoPick and a very common setting in many mouse drivers that helps locate your pointer when you press CTRL.
1 - Open your Control Panel and select the Hardware and Sound section.
2 - Select the Mouse option.
3. In your Mouse driver settings dialog, select Pointer Options and make sure that Show location of pointer when I press the CTRL key is disabled, as shown below.