HWiNFO32 Portable Release
Professional Hardware Information and Diagnostic Tool
Few "just in case" notes:
1. In order to prevent storing of registry settings (in HKCU) do not check the "Remember Preferences" in the "Configure" window. All settings in this window are stored in the HWiNFO32.INI file.
2. Application installs its own driver. When the "Persistent Driver" option is unchecked (which is by default), it will uninstall it upon closing, so no other registry traces should be left.
If the application requires some further modifications, let me know !