I also noticed that the verbose output of my low spec pc is much shorter than my laptop.
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-gcc-ar" rcs "C:\Users\jasper\AppData\Local\Temp\arduino_build_62974\core\core.a" "C:\Users\jasper\AppData\Local\Temp\arduino_build_62974\core\new.cpp.o"
this is the redundant line
Thanks for the links! I'll try installing the same McAfee on my other PC to see if it is the cause of the slowdown.