Press Windows + I to open Settings
Click System
Click About
Look for System type
If it says 64-bit operating system, your Windows 11 is 64-bit
If it says 32-bit operating system, your Windows 11 is 32-bit
Press Windows + R
Type msinfo32 and press Enter
Check System Type
x64-based PC means 64-bit
x86-based PC means 32-bit
Open File Explorer
Right-click This PC
Click Properties
Check System type under Device specifications