How to enable disk encryption in Windows 11? Does Windows 11 home encrypt hard drive by default?

 All apps > Windows Tools. Right click on System Information and select Run as administrator. When the System Information window opens, on System Summary, scroll down and locate Device Encryption Support. If it's Value is Meets prerequisites, then you can enable Device Encryption on your system

if you clean install Windows 11 later this year or buy a new PC with 24H2 installed, BitLocker device encryption will be enabled by default. If you just upgrade to 24H2, Microsoft won't enable device encryption automatically. The feature could impact SSD performance on some devices.