Windows 10: "Operation System Not Found" error after removing CMOS battery in DELL laptop.

Hi
I am using Dell Inspiron 14 n4110 as my secondary laptop. A month ago i've installed Ubuntu on it. During ubuntu installation, I formatted the whole hard drive. When I tried to re-install windows, I could not find any grub support for windows. I've tried many ways from internet and have failed to restore grub. Finally I've tried removing CMOS battery. Now after starting the laptop, I get "Operation System Not Found" message. Note that, it is "Operation system not found". Not "Operating system Not Found.
I've tried installing windows from an external USB drive. Setup continues till restarting. When the laptop restarts, it gives the same message "Operation system not found". I've tried changing the hard drive with a new one, but resuls the same.
Can anybody help me???

Note: The message is "Operation System Not Found"

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:)

 

Dell 7532 Battery will not charge. bought new battery same thing

• Go to Control Panel - Device Manager
• Expand the Batteries section
• Right click the Microsoft ACPI Compliant Control Method Battery and select Uninstall
• Close Device Manager and Reboot

If the above does not work, then it is probably the power lead (adapter). Dell systems are very particular, if it detects the wrong adapter it will not charge the battery. This can happen in error even when the correct power adapter is connected, please
try the solution below:

• Unplug the AC adapter from the wall outlet
• Disconnect any external peripherals connected to the Laptop
• Remove the battery. Refer to the User Manual of the Laptop for instructions on how to remove the battery.
  
  If the Dell laptop has a non-removable battery, skip this step
• Press and hold the Power button for 30 seconds to drain a residual power from the Laptop
• Connect the battery
• Plug the AC adapter to the Laptop
• Turn on the Laptop

 

laptop battery wont charge after latest update

1. Shutdown your laptop.

2. Remove the battery.

3. Connect the AC power adapter to your laptop.

4. Power on the laptop

5. Open the Device Manager by typing Devmgmt.msc into Start Menu or from Control Panel.

6. Under the Batteries category, right-click all of the Microsoft ACPI Compliant Control Method Battery listings, and select Uninstall (it’s okay if you only have 1).

7. Shutdown the laptop.

8. Insert the battery.

9. Power on the laptop.

If above suggestions wont resolve the battery charge issue then follow below steps.




Step 2

1. Shutdown the laptop.

2. Remove the battery.

3. Start the laptop with only AC adapter connected to laptop.

4. When you login to Windows OS connect the battery while Windows OS working.

 

Does CMOS battery make an important role?

Another expert kindly suggested that the beep code may be due to removal of your CMOS battery and you may need to update your BIOS and replace your CMOS battery.