I've just had a Datto installed on Friday using ShadowProtect for backups. CPU Utilization tends to hang around 23% - 25% which is unusual. I've checked on other blogs and see that other users have had the same issue, but I haven't seen any posted solutions.
IBM x3650 Xeon E5607 6GB RAM Virtual Disk C: 135GB RAID 1, Virtual Disk D: 1.1TB RAID 5
Microsoft Visual C++ 2008 Redistributable - x86 : 9.0.30729.6161
Oracle VM VirtualBox Guest Additions : 4.0.18.0
ShadowSnap
StorageCraft ShadowProtect : 5.0.1.23057
All of these were installed to get my Datto running. It completed its first successful seeding backup on Friday.