What you will achieve

Stable Wi‑Fi on Windows 11 without unnecessary reinstalls — identify whether the issue is PC, driver, or router side.

1) Quick isolation tests

Does the same network fail on other devices at the same time? If yes, suspect router/ISP.
Does the PC work on another Wi‑Fi network (phone hotspot)? If yes, suspect router settings or band steering.
Does Ethernet work when Wi‑Fi fails? If yes, focus on wireless drivers and power saving.

2) Disable aggressive Wi‑Fi power saving

Settings → System → Power & battery — set plugged-in power mode to Best performance while testing.
Device Manager → Network adapters → your Wi‑Fi adapter → Properties → Power Management → uncheck Allow the computer to turn off this device to save power.

3) Update or roll back the Wi‑Fi driver

Device Manager → Network adapters → right-click Wi‑Fi → Update driver.
If drops started after an update, Roll back driver when available.
For Intel/Realtek/MediaTek, also check the vendor site for a newer package than Windows Update offers.

4) Forget and rejoin the network

Settings → Network & internet → Wi‑Fi → Manage known networks.
Forget the SSID, reboot, reconnect with current password.
Prefer 5 GHz if signal is strong; try 2.4 GHz if distance/obstacles are high.

5) DNS and router checks

Flush DNS — see our flush DNS guide.
Reboot the router and modem (power off 30 seconds).
Disable router “smart connect” band steering temporarily if devices bounce between bands.

6) Network reset (last resort)

Settings → Network & internet → Advanced network settings → Network reset. This removes VPN clients and saved networks — document VPN settings first.