QueryPerformanceCounter() is likely to work on Windows 2000 and above, and guaranteed to work on Windows XP and above so I have removed use of either GetTickCount() or GetTickCount64() in the PR
QueryPerformanc eCounter( ) is likely to work on Windows 2000 and above, and guaranteed to work on Windows XP and above so I have removed use of either GetTickCount() or GetTickCount64() in the PR