One thing i have noticed is on my laptop it takes a very long time to do a full scan but on the PC which i use most of the time (its newer and is more powerful ) it only takes a few minutes, is the power of the PC making the scan faster?
To answer my own point above -
I have timed it on the SSD PC and it took 15 minutes to do a full scan, it took a lot longer on the non SSD laptop so i assume its just the extra power and faster SSD drive that is making the PC so much quicker than the laptop.