Operating system installation and maintenance
Managing hardware and devices
Installing, uninstalling, and working with applications
Customizing the interface
System properties, startup, and shutdown
Disks, drives, and volumes
Files, folders, and shares
The registry
Processes, talks, and services
Digital media
Network configuration
The internet
Wireless networking
User, group, and computer accounts
Event logs and log files
Security and auditing
Performance tuning
Backup and recovery
Crashes and errors.