IT Notes
Beginner-friendly writeups for support tickets, network symptoms, Windows fixes, and useful field habits.
Looking for a quick self-check? Browse practice quizzes.
Got a 169.254 address, no default gateway, or websites that will not resolve? Use these Windows checks to find whether DHCP, the gateway, or DNS is failing.
Use Port → VLAN → MAC → DHCP → Gateway to find the first failed check when a device has link but no network.
A practical beginner explanation of subnets, masks, and why subnetting matters in IT support learning.
Windows says connected but websites will not load? Check Link → IP → Gateway → Internet → DNS in this five-step troubleshooting guide.
A beginner-friendly explanation of VLANs and why they are useful in homelab and small network practice.
A practical beginner guide to computer hardware parts and how they relate to everyday IT support troubleshooting.
How to use Windows Device Manager to identify driver and hardware issues in beginner help desk work.
A practical beginner overview of malware types, infection signs, basic response steps, and when to escalate.
A practical beginner guide to paper jams, toner, print queues, drivers, network printers, and office support habits.
A practical beginner guide to SSDs, HDDs, SATA, NVMe, drive failure symptoms, and support replacement thinking.
A practical beginner guide to structured troubleshooting for help desk tickets and IT support learning.
A beginner-friendly guide to common Windows commands used in help desk troubleshooting.
What Safe Mode and Startup Repair do, when to use them, and what beginner support learners should avoid.
A practical checklist for when devices connect to a new access point but cannot reach the internet.
A beginner-friendly explanation of why a device gets a 169.254 address and what to check first.
Share a support scenario or beginner IT question that would make a useful note.