Hmmm, I activated RAD by doubleclicking on its icons. It got mounted. When I rebooted the system did not start because it tried to boot RAD: instead of AmiKit: And you're right, when I solved this the RAD: icon did not appeared on desktop and the system reported it's already mounted. When I moved the RAD to Devs:DosDrivers, the system booted however behaved strangely and freezed... it's long time since I worked with RAD and I think it was on real Amiga.. maybe there are some issues when used with emulation? Or when AfA_OS is installed? The AfA_OS changes some system parts and is also system resident as well as RAD... maybe there is the conflict.