Windows automatically goes to sleep mode if you leave it alone for a while. You can have your Windows 10 device up and running simply with a click of a mouse or press of a key from your keyboard. But in some cases, users are complaining about their computer not waking up from hibernation, which is forcing the user to reboot/ reset it. They are seeing an error status- 0xC000009A. Apply these easy fixes to quickly tackle the issue.
Fix – 1 Change power settings
Changing power settings should fix this issue.
1. By pressing the Windows key along with the ‘R‘ key you can access the Run window.
2. In that Run window, type “cmd“. Then, press ‘Ctrl+Shift+Enter‘ together.
3. To check out the available sleep states, type this powercfg command, and hit Enter.
4. Now, you need to execute this simple code to execute this code to identify the wake timers’ information.
5. To know what woke your device up last time, execute this command-
6. Finally, to identify the list of devices that can wake up your system from sleep, copy-paste this single line, and hit Enter.
You can know what has caused the issue in the first place. Uninstalling and re-installing the same would help you to solve the issue.
Many users have found out that the Intel Management Engine Interface (IMEI) is the main culprit behind this issue.
Fix – 2 Uninstall and re-install IMEI
Some users have complained the Intel Management Engine Interface (IMEI) has woke up their computers.
1. Press the Windows key along with the ‘X‘ key.
2. Then, click on the “Device Manager“.
3. Now, simply click on the “System Devices“.
4. Then, right-click on the “Intel Management Engine Interface” and then click on “Uninstall device“.
5. After that, click on the “Uninstall” option.
Once you have uninstalled the IMEI driver, close the window and restart your device.
After rebooting everything will be just fine.
Some users have also acknowledged that the ‘IDE SATA AHCI Controller‘ has caused this error on their devices. Either you can uninstall it and reboot your device (following the previous method) or rollback the driver.
Steps to rollback SATA AHCI Controller–
1. Open the Device Manager again.
2. Expand “IDE ATA/ATAPI controllers” header in Device Manager.
3. Double click on the “SATA AHCI Controller“.
4. Go to the “Driver” tab. Then, click on the “Roll Back Driver“.
The driver will be roll-backed on your computer.
Fix – 3 Set to Legacy BIOS mode
1. At first, you need to click on the Search box and then write “change advanced startup options“.
2. Now, click on “change advanced startup options“.
3. Simply click on the “Restart Now” option, under Advanced startup settings,
4. What you need to next is to click on “Troubleshoot“.
5. After that, choose “Advanced options“.
6. When the Advanced options window appears, click on “UEFI Firmware Settings“.
7. Then, click on “Restart” to restart your computer into BIOS settings.
8. When the computer is booting up, press the “Delete“* key from your keyboard to open the bios setup on your computer.
* NOTE– Generally this key varies manufacturer to manufacturer. These are the variety of keys-
Esc, F1, F2, F10, F11, F12 or Delete
9. When the BIOS setup opens up, go to the “Boot” tab by arrow key.
10. After that, navigate to the “Boot List Option” using the keyboard and then press Enter.
11. Then, choose “Legacy” from the list and then hit Enter to select Legacy BIOS mode.
12. Now, press “F10” to save the settings on your computer.
13. After that, select “Yes” to finally save and exit the bios settings on your computer.
Your computer will be restarted.
After rebooting put your computer to sleep and try to wake it up. It will function properly.
Sambit is a Mechanical Engineer By qualification who loves to write about Windows 10 and solutions to weirdest possible problems.