Avast Pro Scan Time Question?

Just thought I’d ask a question about scan times as this makes no sense to me. I have run a full scan on my sons laptop and my laptop. His is a single core Athlon 64 with 2 gigs ram and a 160 GB 5200rpm HD. Mine is a Turion 2.2GHz dual core with 4 gigs ram and a 7200 rpm 320GB HD. I have about 90 Gigs used on the HD where he has about 60 Gigs used. His complete scan takes about 21 minutes where mine take about 40 minutes when I have very little resources used at about 19% processor during a full scan and about 42% memory during a full scan. I have a faster processor, faster HD, double the memory, both running Win 7 64bit. I don’t understand why my scan would take double the time to do? Any ideas?

Maybe because you have more programs/files installed…?? :wink:
30 Gbs make still a difference…
asyn

Different scanning settings.
Other programs running in background. Services, etc.
Different kind of files and archives.
And so on.