If winIDEA slows down significantly or it freezes you have to revert your Windows settings to a previous version of an IME (Input Method Editor), because Microsoft IME was upgraded with the new version 20H2.
1. In the search box on the taskbar, type IME settings.
2. Select the IME settings that are appropriate to your language, e. g., Chinese IME Settings.
3. Turn on option Use previous version of Microsoft IME.
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