Before learning Windows Administration, you should understand how a computer works internally and how Windows communicates with hardware, storage, applications, and users.
1. What is a Computer?
A computer is an electronic device that accepts data,
processes it, stores it, and produces useful information.
Basic working
Input -----> Processing -----> Output -----> Storage
Example
When you open Microsoft Word and type:
Hello World
- Keyboard → Input
- CPU → Processes the input
- RAM → Temporarily holds the running program/data
- SSD/HDD → Stores the Word file
- Monitor → Displays the result
2. Hardware vs Software
|
Hardware |
Software |
|
Physical
parts of a computer |
Programs/instructions |
|
Can be
physically touched |
Cannot be
physically touched |
|
CPU |
Windows |
|
RAM |
Microsoft
Word |
|
SSD |
Chrome |
|
Keyboard |
PowerShell |
|
Motherboard |
Antivirus |
Simple example
Think of a car:
- Engine,
wheels, steering → Hardware
- Instructions/control
system → Software
A computer needs both hardware and software to work.
3. CPU / Processor
CPU = Central Processing Unit
The CPU is often called the brain of the computer
because it executes instructions and performs calculations.
CPU responsibilities
- Executes programs
- Performs calculations
- Processes instructions
- Manages operations
- Communicates with RAM and other hardware
Example
You open Chrome:
You click Chrome
↓
Windows sends instructions
↓
CPU processes instructions
↓
RAM holds Chrome while running
↓
Chrome appears on screen
Important CPU terms
|
Term |
Meaning |
|
Core |
Individual
processing unit |
|
Dual Core |
2 cores |
|
Quad Core |
4 cores |
|
Hexa Core |
6 cores |
|
Octa Core |
8 cores |
|
Clock Speed |
Processing
frequency, usually GHz |
|
Thread |
A sequence of
instructions handled by CPU |
For Windows Administration: CPU knowledge helps when
troubleshooting high CPU usage.
Example:
Get-Process
This can help you inspect running processes.
4. RAM
RAM = Random Access Memory
RAM is the computer's temporary working memory.
When applications are running, they use RAM.
Example
Suppose your computer has:
RAM = 8 GB
You open:
Chrome
VS Code
Microsoft Word
Docker
PowerShell
These programs consume RAM.
RAM characteristics
·
Temporary
·
Fast
·
Volatile
·
Data is normally lost when power is removed
RAM vs Storage
|
RAM |
SSD/HDD |
|
Temporary
memory |
Permanent
storage |
|
Very fast |
Slower than
RAM |
|
Used by
running programs |
Stores
files/programs |
|
Usually
smaller |
Usually
larger |
|
Data
disappears after shutdown |
Data remains |
Easy example
Think of a desk:
- RAM = space on your desk
- SSD = storage cupboard
More desk space means you can work with more things
simultaneously.
5. HDD
HDD = Hard Disk Drive
HDD uses magnetic spinning disks to store data.
Example:
1 TB HDD
can store:
Windows, Documents, Videos, Photos, Applications
Advantages
- Generally cheaper per GB
- Available in large capacities
- Good for bulk storage
Disadvantages
- Mechanical moving parts
- Slower than SSD
- Can be more sensitive to physical shock
- Produces some noise
6. SSD
SSD = Solid State Drive
SSD stores data using flash memory and has no spinning
mechanical disk.
Advantages
- Much faster than traditional HDD
- No moving mechanical parts
- Faster Windows boot
- Faster application loading
- Generally quieter
Example
HDD → Windows may take longer to boot
SSD → Windows usually boots much faster
HDD vs SSD
|
Feature |
HDD |
SSD |
|
Technology |
Magnetic disk |
Flash memory |
|
Speed |
Lower |
Higher |
|
Moving parts |
Yes |
No |
|
Noise |
Possible |
Silent |
|
Boot time |
Usually
slower |
Usually
faster |
|
Cost/GB |
Usually lower |
Usually
higher |
7. Motherboard
The motherboard is the main circuit board of a
computer.
It allows different hardware components to communicate.
Major components connected to motherboard
CPU
↓
RAM ←──── Motherboard ────→ SSD/HDD
├── GPU
├── USB
├── Network
├── Audio
└──
Other devices
Think of it as:
The communication highway of the computer.
For an IT administrator, understanding the motherboard helps
with hardware troubleshooting and device compatibility.
8. BIOS
BIOS = Basic Input/Output System
BIOS is firmware stored on the motherboard.
It starts running when the computer is powered on.
Basic boot process
Power ON
↓
BIOS/UEFI starts
↓
Hardware initialization
↓
Find boot device
↓
Start Windows Boot Manager
↓
Windows starts
BIOS can configure things such as:
- Boot device
- Hardware settings
- CPU settings
- Security options
- Date/time
- Storage configuration
9. UEFI
UEFI = Unified Extensible Firmware Interface
UEFI is the modern replacement for traditional BIOS
firmware.
BIOS vs UEFI
|
BIOS |
UEFI |
|
Older firmware interface |
Modern firmware interface |
|
Traditionally uses MBR booting |
Commonly works with GPT |
|
More limited |
More advanced |
|
Usually text-based |
Can provide graphical interfaces |
|
Older systems |
Modern systems |
Windows 10/11 computers commonly use UEFI + GPT.
10. Operating System
An Operating System (OS) is software that manages
computer hardware and provides an environment for applications.
Examples:
· Windows, Linux, macOS, Android, iOS
Windows example
User à Applications à Windows OS à Drivers / System Services à Hardware
Windows manages:
· CPU, RAM, Storage, Network, Users, Security, Processes,Devices, Applications
11. What is Windows Administration?
Once you understand the fundamentals, you can move into Windows
Administration.
A Windows Administrator manages systems such as:
Users à Computers
à Windows OS à Applications à Network à Storage à Security
Typical responsibilities include:
- · Installing Windows
- · Managing users
- · Managing permissions
- · Installing drivers
- · Managing disks
- · Troubleshooting performance
- · Managing Windows services
- · Configuring networking
- · Windows updates
- · Security configuration
- · Backup and recovery
- · Active Directory
- · Group Policy
- · PowerShell
12. 32-bit vs 64-bit
This refers to the architecture of the operating system and
processor.
32-bit
Older architecture with more limitations on memory
addressing.
64-bit
Modern architecture capable of handling much larger memory
address spaces and modern software.
Most modern Windows computers use:
64-bit CPU
+
64-bit Windows
Example
You may see:
System type:
64-bit operating system,
x64-based processor
Important distinction
x64 generally means the 64-bit x86 architecture.
ARM64 is a different 64-bit processor architecture.
For Windows administration, knowing the architecture is
important when installing:
·
Drivers
·
Applications
·
System utilities
13. Drivers
A driver is software that allows the operating system
to communicate with a hardware device.
Example
You connect a printer:
Printer à Printer Driver à Windows à Application
Without the appropriate driver, Windows may not properly
communicate with the hardware.
Common drivers
- · Display/GPU driver
- · Network adapter driver
- · Audio driver
- · Printer driver
- · Chipset driver
- · Storage controller driver
- · Bluetooth driver
Windows tool
You can manage hardware drivers using:
Device Manager
cmd: or Run:
devmgmt.msc
hdwwiz.cpl
14. Applications
An application is software designed to perform a
particular task.
Examples:
|
Application |
Purpose |
|
Chrome |
Web browsing |
|
Word |
Documents |
|
Excel |
Spreadsheets |
|
VLC |
Media playback |
|
VS Code |
Programming |
|
Docker Desktop |
Container management |
OS vs Application
Windows à Provides
platform/services à Applications Ã
Perform specific tasks
15. Files and Folders
A file contains data.
Examples:
document.doc, photo.jpg, website.html, script.ps1, program.exe
A folder/directory organizes files.
Example:
C:\
├── Users
│ └── Sandeep
│ ├──
Documents
│ ├──
Downloads
│ └── Pictures
│
├── Windows
└── Program Files
16. What is a File System?
A file system is the method an operating system uses
to organize and manage data on a storage device.
It determines how Windows handles:
- Files
- Folders
- Permissions
- File names
- Metadata
- Storage allocation
Common file systems you should know for Windows
administration are:
NTFS
FAT32
exFAT
ReFS
17. NTFS
NTFS = New Technology File System
NTFS is the primary general-purpose file system used by
modern Windows installations.
Important features
- File/folder permissions
- Security features
- Large files and volumes
- Journaling
- Compression
- Encryption support
- File ownership
- ACLs (Access Control Lists)
Example
Windows system drive:
C:\
NTFS
Why administrators need NTFS
Suppose you have:
C:\CompanyData
You want:
Manager → Full Control
Employees → Read
Guest → No Access
NTFS permissions can be used to implement this type of
access control.
18. FAT32
FAT32 = File Allocation Table 32
FAT32 is an older and highly compatible file system.
It can be useful for:
·
USB drives
·
Older devices
·
Compatibility situations
·
Some boot/recovery media
Major limitation
A single FAT32 file cannot exceed approximately 4 GiB.
So a file such as:
5 GB.iso
cannot be stored as one file on FAT32.
19. exFAT
exFAT = Extended File Allocation Table
exFAT was designed particularly for flash/removable storage
and supports large files while maintaining broad compatibility.
Common use cases include:
- · USB flash drives
- · SD cards
- · External storage
- · Cross-platform file transfer
Example
You have a:
128 GB USB drive
and want to transfer a large video or ISO file.
exFAT may be a better choice than FAT32 when compatibility
requirements allow it.
20. ReFS
ReFS = Resilient File System
ReFS is Microsoft's file system designed with resilience
and data integrity in mind.
It is particularly relevant in certain Windows Server and
specialized storage scenarios.
Important characteristics
- · Data integrity features
- · Resilience
- · Large-scale storage support
- · Designed for specific enterprise/storage workloads
Important: ReFS is not simply a replacement for NTFS
in every situation. NTFS remains the normal choice for many Windows system and
general-purpose volumes.
21. File System Comparison
|
Feature |
NTFS |
FAT32 |
exFAT |
ReFS |
|
Windows system drive |
✅ |
❌ |
❌ |
Generally not the normal choice |
|
File permissions |
✅ |
❌ |
❌ |
✅/advanced scenarios |
|
Large files |
✅ |
❌ ~4 GiB/file limit |
✅ |
✅ |
|
Journaling |
✅ |
❌ |
❌ |
Different resilience architecture |
|
USB/removable storage |
✅ |
✅ |
✅ |
Usually not preferred |
|
Enterprise/storage scenarios |
✅ |
❌ |
Limited |
✅ |
|
General Windows use |
⭐⭐⭐⭐⭐ |
⭐⭐ |
⭐⭐⭐ |
⭐⭐⭐ |
Easy way to remember
NTFS → Windows +
Security
FAT32 → Compatibility + older devices
exFAT → USB + Large files
ReFS → Resilience
+ specialized/enterprise storage
22. Windows Storage Example
Suppose your computer has:
Disk 0
├── EFI System Partition
├── C:\
└── Recovery
Partition
You can inspect disks using Windows tools.
Disk Management
Press:
Win + R or cmd
Then:
diskmgmt.msc
You can use it to:
- View disks
- Create partitions
- Format volumes
- Change drive letters
- Shrink volumes
- Extend volumes
23. Useful Windows Commands
Windows Administration, start practicing these
commands.
System information
Systeminfo
Msinfo32
IP/network information
ipconfig
More detailed:
ipconfig /all
Check disk
chkdsk
Show files/folders
dir
Change directory
cd
Show current directory
cd
Windows version
winver
Running processes
tasklist
Stop a process
taskkill /PID 1234 /F
Check network connectivity
ping google.com
Check DNS
nslookup google.com
24. PowerShell Basics
As you progress toward Windows Administration, PowerShell
becomes extremely important.
Get computer information
Get-ComputerInfo
List processes
Get-Process
List services
Get-Service
List network adapters
Get-NetAdapter
Get IP configuration
Get-NetIPConfiguration
Get disks
Get-Disk
Get volumes
Get-Volume
|
Feature |
Command Prompt (CMD) |
PowerShell |
|
Full name |
Command Prompt |
Windows PowerShell |
|
Developed by |
Microsoft |
Microsoft |
|
Main purpose |
Basic Windows command-line operations |
Administration, automation & scripting |
|
Command type |
CMD commands |
PowerShell cmdlets |
|
Command format |
command |
Verb-Noun |
|
Example |
dir |
Get-ChildItem |
|
Output |
Mainly text |
Objects |
|
Scripting |
.bat, .cmd |
.ps1 |
|
Automation |
Basic |
⭐ Advanced |
|
Windows admin. |
Basic |
⭐⭐⭐⭐⭐ |
|
Object-based |
❌ No |
✅ Yes |
|
Pipeline |
Basic text pipeline |
Powerful object pipeline |
|
Remote admin. |
Limited |
Strong support |
|
Active Directory |
Limited |
Excellent |
|
Services management |
Basic |
Advanced |
|
Process management |
Basic |
Advanced |
|
Network admin |
Basic |
Advanced |
|
Cloud/DevOps |
Limited |
Better suited |
|
Learning difficulty |
Easy |
Moderate |
|
Best for beginners |
✅ |
✅ After CMD basics |
25. How Everything Connects
This is the most important concept to understand.
USER
↓
APPLICATION
↓
OPERATING SYSTEM
WINDOWS
┌─── + ───---─────────┐
↓ ↓ ↓
DRIVERS SERVICES
SECURITY
↓
HARDWARE
│
┌───────────┐
↓ ↓
↓
CPU RAM
STORAGE
│
┌──-----───┐
↓ ↓
NTFS exFAT
When something goes wrong, an IT administrator tries to
determine which layer is causing the problem.
26. Real-World Troubleshooting Example
Problem:
"My Windows computer is very slow."
Don't immediately reinstall Windows.
Check layer by layer:
Step 1 — CPU
Is CPU usage very high?
By Powershell- Get-Process
By CMD-
- tasklist
Step 2 — RAM
Is the system running out of memory?
tasklist /fi "memusage gt 1024" - to list all background processes using
more than 1GB of RAM
systeminfo | find "Available
Physical Memory" - to see
how much RAM is currently free.
Step 3 — Storage
Is the disk nearly full?
Step 4 — Applications
Is one application consuming excessive resources?
Step 5 — Drivers
Is there a problematic device driver?
Step 6 — Windows Services
Is a Windows service consuming resources?
Step 7 — Malware/Security
Is suspicious software running?
This is the IT troubleshooting mindset you should
develop.
27. Recommended Learning Order
For your Windows Administration preparation, I recommend
this sequence:
01. Computer Fundamentals
↓
02. Hardware Components
↓
03. Windows OS Fundamentals
↓
04. File Systems & Storage
↓
05. Windows CMD
↓
06. PowerShell
↓
07. Windows Users & Groups
↓
08. NTFS Permissions
↓
09. Windows Services
↓
10. Networking
↓
11. Windows Security
↓
12. Windows Server
↓
13. Active Directory
↓
14. Group Policy
↓
15. DNS & DHCP
↓
16. Backup & Recovery
↓
17. Windows Troubleshooting
↓
18. Automation with PowerShell
Remember -
If you're completely new, focus on these 10 concepts
before moving to advanced Windows Administration:
- CPU
→ Processes instructions
- RAM
→ Temporary working memory
- SSD/HDD
→ Permanent storage
- Motherboard
→ Connects hardware
- BIOS/UEFI
→ Starts and initializes the computer
- OS
→ Manages hardware and software
- Drivers
→ Allow Windows to communicate with hardware
- Applications
→ Perform user tasks
- File
system → Organizes data on storage
- NTFS
→ Main Windows file system with permissions and security features
