On Windows, press `Win + R`, type `msinfo32`, and press Enter
On Windows, open Settings > System > About
On Windows, open Task Manager > Performance tab
On Windows, use Command Prompt and run `systeminfo`
On Windows, use Command Prompt and run `wmic cpu get name`
On Windows, use Command Prompt and run `wmic memorychip get capacity`
On Windows, use Command Prompt and run `wmic diskdrive get model,size`
On Windows, right-click This PC > Properties
On Mac, click Apple menu > About This Mac
On Mac, open System Settings > General > About
On Mac, use System Information from About This Mac
On Linux, run `lscpu`
On Linux, run `free -h`
On Linux, run `lsblk`
On Linux, run `sudo lshw`
On Linux, run `uname -a`
On Linux, run `inxi -Fxz`
Check CPU model
Check RAM size
Check storage type and capacity
Check GPU model
Check motherboard model
Check operating system version
Check device manager or hardware manager
Check BIOS or UEFI information
Use third-party tools like CPU-Z, Speccy, or HWiNFO