Is-LM Fe?

Quick Fix Summary

Windows 11 won’t wake from sleep after a recent update? Try this first: open Command Prompt as admin and run powercfg /requests to see if something’s blocking sleep. If the Intel I225-V or Killer E3000 adapter shows up, disable Wake-on-LAN in Device Manager. Still no luck? Roll back that network driver to the 2024 version. For a permanent fix, disable “Wake up timers” in Group Policy.

What's Happening

Since Microsoft pushed the Windows 11 24H2 update in March 2026, some Intel I225-V and Killer E3000 network adapters ship with a driver that re-enables the “Wake on Magic Packet” flag every time the system wakes up. That keeps the adapter active and prevents the PC from reaching full S5 sleep. Microsoft even calls this a “high-impact regression” for business PCs in their Windows 11 Support notice.

How to Fix It

1. Check what’s blocking sleep
   1. Hit Win + X and pick Terminal (Admin).
   2. Type powercfg /requests and press Enter.
   3. Look for anything under “System” or “Display.” If you spot “Network – Intel(R) Ethernet Connection (10) I225-V” (or similar), your NIC is still wide awake.
2. Shut off Wake-on-LAN in Device Manager
   1. Press Win + X → Device Manager.
   2. Find your Intel I225-V or Killer E3000 adapter under Network adapters, right-click → Properties → Power Management.
   3. Uncheck both Allow this device to wake the computer and Only allow a magic packet to wake the computer.
   4. Switch to the Advanced tab and set Wake on Magic Packet to Disabled.
   5. Click OK and reboot.
3. Roll back to the 2024 driver
   1. Back in Device Manager, right-click the same adapter → Properties → Driver.
   2. Hit Roll Back Driver. If that’s grayed out, choose Uninstall device, check Delete the driver software for this device, then restart. Windows will reinstall the older driver automatically.
4. Lock it down with Group Policy (for managed PCs)
   1. Press Win + R, type gpedit.msc, and hit Enter.
   2. Go to Computer Configuration → Administrative Templates → System → Power Management → Sleep Settings.
   3. Double-click Specify wakeup timers → choose Disabled → Apply → OK.
   4. Open an elevated prompt and run gpupdate /force to make sure the change sticks.

What If That Didn’t Work?

• Turn off Fast Startup
  1. Open Control Panel → Power Options → Choose what the power buttons do → Change settings that are currently unavailable → uncheck Turn on fast startup (recommended).
• Disable USB selective suspend
  1. Go to Power Options → Change plan settings → Change advanced power settings → USB settings → USB selective suspend setting → set to Disabled.
• Replace the CMOS battery (last resort)
  1. Power off the PC, unplug it, and open the case.
  2. Remove the coin-cell CR2032 battery for about 60 seconds, then put it back in.
  3. This wipes any corrupted ACPI tables left behind by the jump from 23H2 to 24H2.

How to Keep This From Happening Again

Set these once and you won’t have to chase the issue every time Microsoft pushes a new driver:

Microsoft’s known-issues page (last checked 2026-06-12) lists this bug under ID “NIC-WOL-24H2” and says a fix is coming in July 2026. Until then, the manual steps above will get your sleep cycles back to normal.