Full System Scan

We bought a new computer two weeks ago (8.1 64 bit) because of XP support ending soon.  At the same time, had our computer tech install NIS 14 (21.1.0.18) on both the 8.1 and XP computers.

 

When I run a full system scan on the 8.1 computer, it takes about 20 minutes, plus/minus.  Today's scan took 17:55 minutes, 290,728 files.  I checked the history files and the 1st scan took 21:19, 308,434 files.  I norrmally run this scan once a week.

 

I got concerned because I'm used to full system scans taking over an hour.  The full system scan on m XP takes about 1.5 hours to complete, with about 1,500,000 plus files.

 

Am I worrying over northing?  I just want to make sure that NIS is fully protecting my new computer.

 

Thank you.

 

Windows 8.1 Pro 64-bit

hard drive:  930 GB, 827 GB free

ram:  8 GB

NIS14 (21.1.0.18)