You can view system requirements for Windows 11 at https://www.microsoft.com/en-us/windows/windows-11-specifications . If you are currently using Windows 10, you can also download the PC Health Check application at https://www.microsoft.com/en-us/windows/windows-11#pchealthcheck to check to see if your computer can upgrade to Windows 11.
To upgrade your system to Windows 11, you must be running Windows 10, version 2004 or later.
Processor: 1 gigahertz (GHz) or faster processor or SoC.
RAM: 4 GB for 64-bit.
Hard Disk Space: 64 GB for 64-bit OS.
Graphics card: Compatible with DirectX 12 or later with WDDM 2.0 driver.
Display: High definition (720p) display that is greater than 9 inches diagonally, 8 bits per color channel.