First of all, you need to do the following:

1. Disable antivirus or add Hand2Note installation folder into exceptions list
2. Install all the latest Windows updates
3. Update Hand2Note to the latest version
4. Remove log files, disable logging

If the problem persists after these steps, try to make a full reinstall.

If you have done all the steps described above including full reinstallation according to the instructions, and Hand2Note keeps freezing or performing slowly, contact support service.