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Operating Systems
The operating system is the software layer that manages hardware, runs applications, and provides the interface people use every day. A Core 2 technician must be comfortable across Windows editions and tools, and must also recognize the fundamentals of macOS, Linux, and mobile operating systems. This chapter covers how to identify the right Windows edition, use the graphical and command-line tools that keep a system healthy, understand file systems and partitioning, and work confidently in non-Windows environments.
Windows Editions and Features
Windows ships in several editions aimed at different users, and the differences matter when you plan installations or troubleshoot missing features. Home targets consumers, Pro adds business capabilities, Enterprise and Education serve larger organizations through volume licensing. Knowing which features exist in which edition prevents wasted time chasing options that were never available.
Home lacks domain join and BitLocker
Windows Home cannot join an Active Directory domain and does not include BitLocker; upgrade to Pro or higher when those features are required.
Pro adds business features
Windows Pro supports domain join, Group Policy, BitLocker, and Remote Desktop hosting, making it the common choice for business workstations.
Enterprise uses volume licensing
Enterprise is licensed to organizations through volume agreements rather than retail and adds advanced management and security controls.
Architecture limits memory
A 32-bit edition can address only about 4 GB of RAM, while a 64-bit edition is required to use larger amounts of memory.
Windows Tools and Utilities
Windows includes many built-in tools for configuration and maintenance, split between graphical consoles and command-line utilities. Choosing the right tool for a task saves time and avoids risky changes. A technician should know where to manage apps, services, disks, tasks, and system information.
Manage apps in Settings or Programs and Features
Uninstall desktop and Store apps through Settings > Apps or the Programs and Features Control Panel item, not by deleting folders.
Use Disk Management for volumes
Disk Management (diskmgmt.msc) creates, formats, shrinks, extends, and deletes partitions through a graphical interface.
Control background services
The Services console (services.msc) starts and stops services and sets their startup type to Automatic, Manual, or Disabled.
Read System Information
System Information (msinfo32) reports hardware, BIOS version, installed RAM, and whether the OS is 32-bit or 64-bit.
Automate with Task Scheduler
Task Scheduler runs programs or scripts on time-based or event-based triggers such as at logon or daily.
The Command Line
Many diagnostic and repair tasks are faster or only possible from a command prompt. Some commands require elevated privileges, obtained by running the prompt as administrator. Knowing a core set of commands lets a technician inspect configuration, repair files, and manage the network quickly.
Elevate before running system commands
Right-click Command Prompt and choose Run as administrator to gain the privileges needed to modify protected system settings.
Repair system files with sfc
sfc /scannow scans protected operating system files and restores corrupted ones from a cached copy.
Renew DHCP with ipconfig
ipconfig /release drops the current DHCP lease and ipconfig /renew requests a new address configuration.
Map shares with net use
The net use command connects a network share to a drive letter and manages those connections.
Apply policy with gpupdate
gpupdate /force reapplies Group Policy settings immediately instead of waiting for the next refresh interval.
File Systems and Partitioning
The file system determines what features a volume supports, and the partition style determines how large a disk can be and how it boots. Selecting the right combination is essential during installation and when preparing external media. The wrong choice can block features like permissions or prevent booting large drives.
Use NTFS for Windows volumes
NTFS supports file permissions, EFS encryption, compression, and journaling, and is required for the Windows system volume.
Use exFAT for cross-platform media
exFAT works natively on Windows and macOS with no practical 4 GB file-size limit, unlike FAT32.
Choose GPT for large disks
GPT supports drives larger than 2 TB and many partitions and pairs with UEFI, while MBR is limited to 2 TB and four primary partitions.
Understand installation types
An in-place upgrade keeps files, settings, and apps, while a clean install wipes the environment for a fresh start.
macOS, Linux, and Mobile
A technician frequently encounters non-Windows systems and must know their core tools and conventions. macOS and Linux each have their own maintenance and command-line approaches, and mobile operating systems differ in how apps are installed and managed. Recognizing these differences allows confident support across a mixed environment.
Back up macOS with Time Machine
Time Machine performs scheduled incremental backups and lets users restore previous versions of files.
Install macOS apps into Applications
Most macOS apps are self-contained bundles installed by dragging them into the Applications folder in Finder.
Use core Linux commands
Commands such as ls, pwd, cd, chmod, and sudo list files, show and change directories, set permissions, and elevate privileges.
Know mobile OS openness
Android is open source and allows multiple app stores and sideloaded APK files, while iOS normally restricts installs to the App Store.
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