To be honest the number of scans is a bit of an overkill - I have my system set to screensaver scan - and once a month (if I remember, I have a boot scan)
I Have IE9 set to clear all temp internet files when closed and I use TFC once a month to get the last bits out. I never touch my registry as it is pointless. A fully clean and optimised registry will gain you 0.1 of a mini micro millisecond or thereabouts. It is better to empty the temps and do a weekly defrag
Other security - well I have AIS and Malwarebytes (again when I remember to run it )
Total infections to date Zero - and I do visit some bad sites to get some samples (Using my VM of course)
As for utilities - well I use BlackVipers site to set my services and then just let windows run