No, it's not just on startup - it's anytime the WMC app starts. So if you start it, it takes 5 minutes. If you close it then reopen it, it takes 5 minutes. And yes, it has WMC on SSD and a 3TB HDD for recordings. The thing is so overspec'ed that really, delays are abnormal, and it only started yesterday. With nothing changed, either - I didn't install anything, literally.