An error was detected on device \Device\Harddisk3\DR3

Important Drivers Specific: Intel AHCI/RAID Drivers
1

Hello, I have opened the event viewer and I can see these error messages there.

An error was detected on device \Device\Harddisk2\DR2
An error was detected on device \Device\Harddisk3\DR3

http://imageshack.com/a/img661/9927/ao6p71.jpg

Any idea what may cause this on a brand new PC?

2

Not really.
I recommend to check your HDDs by using the diagnostic tool of the HDD manufacturer.