Bluetooth Mouse Disconnecting Randomly Windows 11 Fix [2026]

Quick Answer: Bluetooth mouse disconnects because Windows 11's Bluetooth power management puts the radio to sleep. Disable "Allow the computer to turn off this device to save power" in Bluetooth adapter properties and remove/re-pair the mouse.

Symptoms

• Mouse works for 30 seconds then disconnects
• Mouse reconnects automatically after 5-10 seconds
• Disconnection happens when idle (not moving mouse)
• Issue worse when laptop is on battery power
• Mouse shows "Connected" in Bluetooth settings but cursor won't move
• Disconnects when Wi-Fi is actively downloading

Why This Happens (Root Cause)

Bluetooth mouse disconnections stem from three Windows 11 behaviors:

1. Bluetooth Selective Suspend: Windows 11 aggressively powers down Bluetooth radios to extend battery life. When the mouse is idle, Windows puts the Bluetooth adapter in a low-power state. The mouse "sleeps" too and doesn't send keep-alive packets.

2. 2.4GHz Band Congestion: Bluetooth and Wi-Fi 2.4GHz share spectrum. When Wi-Fi downloads at high speed, it can "drown out" Bluetooth mouse packets, causing disconnections.

3. LE (Low Energy) Mode Issues: Windows 11 22H2+ uses Bluetooth LE for mice when available. Some mouse firmware (older Logitech, Microsoft mice) doesn't handle LE mode transitions well.

How to Diagnose (Manual)

Check 1: Verify Bluetooth Connection Quality

Get-PnpDevice -Class Bluetooth | Select-Object Name, Status

Status should be "OK". "Error" indicates driver or hardware failure.

Check 2: Check Bluetooth Radio Power State

powercfg /energy /output "%TEMP%\energy-report.html"
start "%TEMP%\energy-report.html"

Look for: "Bluetooth radio suspended" events in the report.

Check 3: Inspect Bluetooth Event Log

Get-WinEvent -FilterHashtable @{LogName='Microsoft-Windows-Bluetooth-BthLEPrepairing/Operational'; StartTime=(Get-Date).AddHours(-1)} | Where-Object {$_.Message -like "*disconnect*"} | Select-Object TimeCreated, Message

Look for: "Peripheral disconnected due to timeout" messages.

Step-by-Step Fix

Method 1: Disable Bluetooth Power Management (Recommended)

1. Device Manager → Bluetooth
2. Expand and find your Bluetooth adapter (Intel, Realtek, Qualcomm)
3. Right-click → Properties
4. Go to Power Management tab
5. Uncheck "Allow the computer to turn off this device to save power"
6. Click OK
7. Repeat for any "Bluetooth Device (Personal Area Network)" entries

Method 2: Remove and Re-pair Mouse

1. Settings → Bluetooth & devices → Devices
2. Find your mouse → Click ... → Remove device
3. Put mouse in pairing mode (usually hold button on bottom)
4. Click Add device → Bluetooth
5. Select your mouse and pair

This clears stale pairing keys that can cause authentication failures.

Method 3: Disable Bluetooth LE Mode

For Intel Bluetooth:

1. Device Manager → Bluetooth → Intel Wireless Bluetooth
2. Right-click → Properties → Advanced tab
3. Find "Bluetooth Low Energy" or "LE Mode"
4. Set to Disabled
5. Click OK

Warning: This increases battery usage slightly.

Method 4: Update Bluetooth Drivers

# Run as Administrator
Get-PnpDevice -Class Bluetooth | Update-PnpDevice -Confirm:$false

Then:

1. Go to manufacturer's website (Intel, Realtek, Qualcomm)
2. Download latest Bluetooth driver
3. Install and restart

Method 5: Registry Fix for Persistent Bluetooth

Create a .reg file:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\BTHPORT\Parameters]
"DisablePnpScan"=dword:00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\2a737441-1930-4402-8d77-b2bebba308a3\25dfa149-5dd2-4ee9-9f1c-4377705e3cbe]
"Attributes"=dword:00000000

What this does: Disables Plug-and-Play scanning that can interrupt connections and exposes Bluetooth power settings.

Method 6: Use 5GHz Wi-Fi (Reduce Interference)

1. Settings → Network & internet → Wi-Fi
2. Click your network → Properties
3. Look for "Band" — should say 5GHz

If on 2.4GHz: Change router settings to prefer 5GHz, or rename 2.4GHz and 5GHz networks separately and connect to 5GHz.

How Againly Diagnoses This Automatically

Againly runs check_peripheral_usb in 0.5 seconds and detects:

• Bluetooth power management status
• LE mode vs Classic mode usage
• Wi-Fi band (2.4GHz vs 5GHz) and interference potential
• Bluetooth driver version and known compatibility issues

Instead of guessing, it shows: "Bluetooth selective suspend active — disabling power management and recommending 5GHz Wi-Fi to reduce interference."

[CTA: Try free diagnosis]

Prevention

• Keep mouse in motion — Windows won't suspend Bluetooth if there's constant activity
• Use 5GHz Wi-Fi — eliminates 2.4GHz band competition
• Update mouse firmware — Logitech, Microsoft release Bluetooth compatibility updates
• Don't use USB 3.0 near Bluetooth adapter — USB 3.0 emits 2.4GHz interference

FAQ

Q: Why does my mouse disconnect only on battery? A: Windows increases Bluetooth power saving when unplugged. Disable selective suspend or keep laptop plugged in.

Q: Will a Bluetooth dongle fix this? A: Sometimes — USB Bluetooth adapters often have better antennas than laptop internal Bluetooth.

Q: Why does it disconnect when downloading files? A: Wi-Fi 2.4GHz and Bluetooth share spectrum. Heavy Wi-Fi usage interferes with mouse packets.

Q: Is this a Windows 11 bug? A: It's aggressive power management. Windows 11 prioritizes battery life over peripheral reliability.

Related: Mouse Cursor Jumping Fix | Wireless Keyboard Lag Fix