What isn’t working?
Start with the symptom you can see.
Common problems
Jump to a guided check for a common issue, or search for something else.
| Category | Problem | Status | Action |
|---|---|---|---|
| Ethernet | My link speed says 100 Mbps | Available | Start a check |
| Ethernet | A connection without internet | Quick checks | View steps |
| Wi-Fi | Wi-Fi disconnects | Available | Start a check |
From the guide library
Step-by-step help to find and fix the problem.
| ID | Title | Summary | Status |
|---|---|---|---|
| A-a7e0395c | Receive and Transmit Buffers: What Value to Use? | What Receive Buffers and Transmit Buffers mean on Windows 11, why driver units and defaults matter, and how to compare and undo one setting change. | Published |
| A-10e54680 | Speed & Duplex in Windows 11: Auto or a Fixed Value? | What Speed & Duplex controls in Windows 11, why Auto Negotiation is usually right, how fixed settings must match the port, and how to undo a change. | Published |
| A-e623303c | Public or Private Network in Windows 11: Which Should You Use? | Choose Public or Private for a Windows 11 connection by checking trust and local sharing needs. Keep firewall rules, discovery and permissions separate. | Published |
| A-0b3e40d0 | Random Hardware Addresses: On or Off for Windows 11 Wi-Fi? | Choose random hardware addresses for Windows 11 Wi-Fi by checking privacy needs, per-network settings and any device registration or router reservation. | Published |
Know where to look next.
Browse the connection you are working on.
Ethernet
Wi-Fi
Windows 11
Diagnostics