Windows 10, Windows 7 + Wacom ET-0405-U (Graphire?) will interfere with the script editor causing slowdown when opening, editing and closing a script.
Workaround is to go to the Windows Control Panel > Human Interface Devices and disable the wacom driver: specifically the Wacom HID Pen
Windows10 – open device manager and disable
- Human Interface Devices > Wacom HID Pen
- Mice and other pointing devices > Wacom Mouse