All checks take place on a schedule, some are daily and the rest range from every 60 seconds to 30 minutes.

The checks we run are as follows:

Uptime
Antivirus
Backups
Disk drives
Disk space
Drive errors and raid failures
Event log errors
Server performance
Workstation performance
Performance checks
Processor utilisation/performance
Network performance
Bandwidth
Memory (RAM) status
Mobile devices checking in
Windows services
Server chassis intrusion
Failed logins
Expired passwords
Suspicious ports
Windows updates status