Oldclassiccalc-2.0-setup.exe

: Some less-known AVs might flag it as “hacktool” due to its method of modifying system UI preferences. This is a false positive.

It is compatible with Windows 7, 8, 10, and 11. Installation Process oldclassiccalc-2.0-setup.exe

: Follow the prompts to select your installation language and destination folder. : Some less-known AVs might flag it as