Antivirus :: Defender Causing Slow Icon Display

So in another thread I questioned why on boot up my desktop icons were a bit slow in drawing themselves. They take a few seconds to fully draw with a number of them showing as white generic paper icons. I then found folders with a large number of exe files were also slow to display the icons. Increasing icon cache, rebuilding it didn't make a difference. I was also noticing that the folders slow to draw the icons once finished gave no further grief if I subsequently opened them. Until the next reboot!

Finally i I know why, it's Windows defender. The antimalware service is kicking in causing the slow icon draw. I suppose it's doing its thing but the slow draw of the icons on the desktop when I log in annoys me. It's only a few seconds but running SSD and given the cost of the system I expect it to be a bit more instant. I am sure it's not as bad as this on my Windows 7 laptop which runs security essentials. I turned off real time protection temporarily and can confirm that the folders were then drawing the exe icons instantly. So definitely defender the culprit.

i am also considering trying another paid anti virus. Kaspersky sounds like it has good rep and is lightweight - I was only going to go for the anti virus / real time protection aspect as I am happy with Windows in built firewall. Does it play nice with Windows 10? I just want something light on resources, nag free and something that won't interfere with the drawing of the icons. I thought defender being integrated and an MS product would give the littlest grief but I guess I'm wrong. Unless something can be set to prevent it real time scanning the desktop icons.