System Configuration (msconfig)
msconfig controls startup behavior and boot options. Tabs: General (Normal/Selective/Diagnostic startup), Boot (boot options: Safe Boot — Minimal, Network, Alternate Shell; No GUI Boot; Boot Log; Base Video; OS Boot Information; timeout for multi-OS), Services (enable/disable non-Microsoft services; Hide all Microsoft services to isolate third-party), Startup (redirects to Task Manager in Windows 8+), Tools (links to other admin tools). Safe Boot options: Minimal (safe mode, no network), Network (safe mode with networking), Alternate Shell (safe mode with command prompt), Active Directory Repair. Use msconfig for troubleshooting: disable all third-party services → if problem resolves, re-enable in halves to isolate the cause (binary search approach).
Device Manager
Device Manager (devmgmt.msc) manages hardware devices and drivers. Access: right-click Start → Device Manager, or Control Panel → Hardware and Sound → Device Manager. Status icons: yellow exclamation mark = driver problem or device conflict, red X = device disabled, blue i = device has manual configuration, downward arrow = device disabled by user. Actions: Update driver (search automatically or browse for driver file), Roll Back Driver (revert to previous driver version), Disable device, Uninstall device (check 'Delete the driver software for this device' to fully remove). View menu: Show hidden devices (displays non-present devices). Scan for hardware changes: detects newly plugged devices. Use for: diagnosing driver issues, checking IRQ/resource conflicts, enabling/disabling hardware.
Event Viewer
Event Viewer (eventvwr.msc) is the central log for Windows system events. Structure: Windows Logs (Application, Security, Setup, System, Forwarded Events), Applications and Services Logs (software-specific logs). Event levels: Critical (severe problem), Error (significant problem), Warning (potential problem), Information (normal operation recorded), Audit Success/Failure (security). Key logs: System log — hardware, driver, OS events. Application log — application crashes, errors. Security log — logon/logoff events, privilege use, object access (requires auditing enabled). Filtering: right-click log → Filter Current Log (filter by level, source, Event ID, keywords, time range). Custom Views: save filters for recurring searches. Event ID 41 = unexpected shutdown. Event ID 1074 = controlled shutdown. Event ID 6006 = clean shutdown. Subscribe to forwarded events from remote computers via subscriptions.
Registry Editor (regedit)
Registry Editor (regedit.exe) is a hierarchical database storing Windows and application configuration. Structure — 5 root hives: HKEY_LOCAL_MACHINE (HKLM): machine-wide settings, hardware, installed software. HKEY_CURRENT_USER (HKCU): settings for the logged-in user. HKEY_USERS (HKU): all user profiles. HKEY_CLASSES_ROOT (HKCR): file associations, COM objects (merged view of HKLM and HKCU). HKEY_CURRENT_CONFIG (HKCC): current hardware profile. Value types: REG_SZ (string), REG_DWORD (32-bit number), REG_QWORD (64-bit number), REG_BINARY (raw binary), REG_MULTI_SZ (multi-string), REG_EXPAND_SZ (string with environment variable). Always export (back up) the relevant key before editing: File → Export. To run a program at startup: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run (all users) or HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run (current user). Registry corruption can cause boot failures — edit with caution.
Group Policy Editor (gpedit.msc)
Group Policy Editor allows configuration of Windows settings through policy objects. Available on: Windows Pro, Enterprise, Education (NOT Home). Structure: Computer Configuration (applies to machine regardless of who logs in) and User Configuration (applies to the logged-in user). Key policy areas: Software installation, Windows settings (security settings, scripts, folder redirection), Administrative templates (hundreds of registry-backed settings). Common uses: disable USB storage, enforce password policy, restrict access to Control Panel, configure Windows Update source (WSUS), hide specific drive letters. gpupdate /force in CMD applies policies immediately without waiting for the refresh interval. On domain-joined computers, Group Policy is managed from the domain controller via GPMC; local gpedit.msc is for standalone computers.
Disk Management and Other Tools
Disk Management (diskmgmt.msc): Create, resize, format, and delete partitions. Initialize new disks (MBR or GPT). Change drive letters. Convert basic disk to dynamic disk. Extend/shrink volumes. Services (services.msc): Full management of Windows services. Start/stop/restart services, change startup type (Automatic, Automatic-Delayed, Manual, Disabled), configure recovery actions on failure, change service logon account. Local Security Policy (secpol.msc): Configure security settings including password policy, account lockout, audit policy, user rights, and security options. Available on Pro/Enterprise only. Performance Monitor (perfmon.exe): track and log performance counters over time; create data collector sets for baseline and trend analysis. Task Scheduler (taskschd.msc): create automated tasks triggered by time, event, or condition.
Control Panel Applets
Key Control Panel applets for A+: System (advanced system properties, Remote settings, System Protection, Environment Variables), Programs and Features (uninstall/repair programs, turn Windows features on/off), User Accounts (manage local accounts, UAC settings), Network and Sharing Center (adapter settings, sharing options), Action Center / Windows Security, Devices and Printers (manage printers and external devices), BitLocker Drive Encryption (turn on BitLocker, manage recovery keys), Credential Manager (manage saved Windows and web credentials), Internet Options (browser settings, security zones, trusted sites), Power Options (balanced/power saver/high performance plans, sleep settings, hibernate). Windows Settings app (modern replacement): Settings → System, Accounts, Update & Security, Privacy — many Control Panel functions migrated here in Windows 10/11.