If you are using SOURCENEXT CORPORATION's Virus Security series for your security software, you might encounter one of these problems.
If you encountered one of these problems, uninstall Virus Security first and then install the latest version of Virus Security.
Note) If your Virus Security is up to date by automatic update, the problem may not be solved.
You can refer here to see how to (re)install the latest version of Virus Security. (Japanese)