Yes, if there is a Windows 10/11 Pro key embedded in BIOS it is used automatically to install Windows 11 Pro. When first online it will also activate automatically.
You can either use Lenovo's Recovery ISO (Windows plus drivers plus some Lenovo apps) or the official Windows 11 ISO from Microsoft. Both ISOs can be downloaded and create a USB flash drive from any computer, it doesn't have to be a Lenovo computer or the specific laptop model. If you use the...
No harm to check it. After 3-4 failed attempts to load Windows, you see the Troubleshooting screen. From there select Troubleshoot and then Advanced Startup Options. Restart and select 4 Safe Mode. See if the computer boots in Safe Mode. From there uninstall any drivers, disable startup...
If you want to have your apps and data from Windows 10, you must have both Windows 10 disk and laptop disk connected in either the laptop (Windows 10 disk on SATA to USB adapter) or the other computer. Then carefully clone the Windows 10 disk on the laptop disk (make sure you don't do the other...
No need for a product key, since the laptop has a digital license in Microsoft servers. Just download latest Windows 11 ISO, create a bootable USB flash drive and start Setup from there. When asked click "I don't have a product key" and you will be presented with a list to choose the appropriate...
Download Winaero Tweaker which has many tweaks including enabling/disabling the classic File Explorer (without tabs). Easy to use without manually modifying keys in Registry.
https://winaerotweaker.com/
Legacy BIOS mode, aka CSM (Compatibility Support Module) is the same thing. Name depends on UEFI firmware, most manufacturers use CSM.
All these are not necessary and he risks damaging his working Windows 11 installation. First make sure the Windows 11 disk has higher priority and boot the PC...
Right-click on the Bluetooth device with the error, select Properties and see what the hardware IDs are (Vendor ID and Device ID). Google these to find drivers. You can also post them so we can help you.
PS: That's one of the reasons I insist the Windows disk is always connected at SATA0 (if SATA model) and every other SATA device at the next SATA ports. So even if the BIOS is reset for some reason, the Windows disk has always higher priority by order of appearance and I avoid such conflicts...