7. AntiVirus interfering? No, only Windows Defender (anti-malware, not anti-virus in Win7) and I've stopped it monitoring my Arduino paths
Which paths specifically? I think the most important one is the temporary build folder, which changes every time you open a new sketch or restart the Arduino IDE.
Try out 1.6.5:https://www.arduino.cc/download_handler.php?f=/arduino-1.6.5-r5-windows.zipThe difference is quite shocking. Whenever I temporarily go back to that version or older for backwards compatibility testing or providing support for someone using an old version I'll be sitting there waiting for the compilation to finish for a minute before I realize that it finished so fast I didn't even notice.
I think it does but I only just now installed 1.8.2 so this feature is new to me.