Public sandbox analyses, such as those from Hybrid Analysis , generally classify the file as having when downloaded from the official source. However, because it modifies system-level behavior to redirect calculator shortcuts, some antivirus programs may flag it as a "potentially unwanted program" (PUP). OldClassicCalc-2.0-setup.exe - Hybrid Analysis
: Microsoft introduced a touch-first Metro calculator. Desktop users hated it. The classic version was hidden but still accessible via calc.exe —for a while. oldclassiccalc-2.0-setup.exe