This page addresses the following issue. When you try to install EmEditor, the following message box appears and installation stops.

If you use anti-virus software such as Trend Micro Antivirus, please disable the software temporarily while installing EmEditor.

Please use Disk Cleanup that comes with Windows.  To start Disk Cleanup, click the Windows Start button, type “Disk Cleanup” and press Enter. Click the “Clean up system files” button to complete delete unnecessary system files. After you finish cleaning up unnecessary files, you can restart Windows and try installing EmEditor again.