Today we will be solving the Device not found 3F0 error which is a common error, especially among HP (HP Pavilion G6), Lenovo, Acer, and Dell laptops/desktops. This error occurs when the computer is turned ON and when the system is about to boot. It can happen on windows 7, 8, or 10. When a mentioned error occurs one of the following messages will be displayed on your screen:
This is well, the most simple solution and the easiest one, try to change the boot sequence in the BIOS settings of your motherboard. Sometimes most easier solutions can provide great results and solve our problems. If sadly this fails and the issue persists move to the next solution.
Performing hard reset can often solve issues, to perform a hard reset do the following:
then
Reconnect everything back of your peripherals.
If by any chance problem still persists follow the next step:
Use the built-in tool in the Hp device to solve the issue:

Error CausesThe operation timed out waiting for a response from the receiving (POP) server 0x8004210a Task 'SMTP server name - Sending and Receiving reported error' (0x8004210A): 'The operation timed out waiting for a response from the receiving (POP) server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).'
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlStorageDevicePolicies
CHKDSK [volume [[path] filename]] [/F] [/V] [/R] [/X] [/C] [: size]]Note: In the command given above, “[/F]” will try to fix the system errors while “[/R]” will be the one to fix the bad sectors.
“Error Code 0xC004F009, The Software Licensing Service reported that the grace period expired.”One of the possible causes of this error is that it could be that the grace period has already expired way before the system was activated which is a result of which the system is in the Notifications state at this moment. The error code 0xC004F009 has something to do with MAK-enabled computers in an enterprise when it comes to Volume Licensing. One of the reasons that this error pops up is due to the possibility that the computer was not activated yet even when it was already connected to the Enterprise. Another most likely cause of the error is when the system was never connected with the Enterprise at all and the given grace period has expired before your computer system is activated. Whatever the real cause of this error, this post will guide you in fixing it. Just refer to the instructions given below to fix it.
“Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52).”If you are one of the users who encountered this kind of error on your Windows 10 computer, read on as this post will guide you on how you can fix this Bluetooth error. According to security experts, the key to fixing this error is to sign the Bluetooth A2DP files with the built-in tool, System File Checker. Apart from that, you could also run the Hardware and Devices troubleshooter or perform System Restore, as well as update or reinstall the concerned drivers. For more details, refer to each one of the options provided below.