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Rev

Thanks for comparing the solutions, please mention compatibility. Which of those solutions will work on non-win platforms?
– Robert Cutajar
Commented May 29, 2017 at 19:58
1

ManagementObject code using "\\.\root\cimv2:Win32_OperatingSystem=@" doesn't work on Windows XP because apparently Win32_OperatingSystem is not a singleton on XP. Instead I found that I needed to use a query to find the primary instance and loop over the query results, as demonstrated in this answer which worked for me on both XP and Win 7: stackoverflow.com/a/7407346/382885
– PolyTekPatrick
Commented Jul 6, 2017 at 11:54
Great answer. Thanks ! I just wanted to add two things : GetTickCount64() is not supported on versions of Windows before Vista, and PerformanceCounter("System", "System Up Time") takes REALLY long on my W7 laptop (more than one minute. Don't ask why.)
– AFract
Commented Jul 26, 2017 at 12:52
If you use @"dd\ \d\a\y\s\,\ hh\ \h\o\u\r\s\,\ mm\ \m\i\n\u\t\e\s\,\ ss\ \s\e\c\o\n\d\s", it spaces things out nicely. "26 days, 05 hours, 32 minutes, 48 seconds"
– B E
Commented Feb 20, 2023 at 20:35

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