Hi Mark
1. Get yourself a good quality security suite and keep it updated, you should then not have any problems. (In addition keep the Windows Firewall active and download Microsoft Defender)
2. Make regular backups of your system, so if the system does crash it will cause minimal disruption.
3. Use a router to connect to the internet, as most contain a hardware Firewall, and allow you to block sites you don’t want. (You will also find many other security settings in there)
4. Make sure you have the Flash Player 9 installed and activated. (This is the software Roland Arranger .com use)
5. The play bar is after the write up, but before the comments. (Just click the arrow)
Hope this helps

Bill