EZ Uptime

EZ Uptime is a feather-light and portable application designed to monitor your computer's uptime and tell you for how long it's been running. It contains just a couple of options and comes in handy when you leave your PC unattended. This way, you can figure out if it was restarted, whether automatically by a process or manually by another person with access to your computer.

Doesn't require installation

The entire program's wrapped into a single .exe file that you can save anyplace on the disk or transfer to a USB flash drive to seamlessly launch it on any PC with as little effort as possible.
It doesn't bring modifications to the system registry, generate additional files on the disk without your permission, nor does it need libraries or other files to work properly. To uninstall it, you just have to delete the executable.

View and copy system uptime

The interface of EZ Uptime is represented by a small window that displays all options available. It automatically detects the machine's uptime at startup and reveals the number of days, hours, minutes and seconds it's been running for. All these values can be copied to the Clipboard by pressing a button. There are no other noteworthy options integrated.

Evaluation and conclusion

System resources usage was minimal in our testing, since the app needed a low amount of memory and CPU to work. It stayed stable throughout its runtime and showed PC uptime in real time.
On the other hand, EZ Uptime hasn't received updates for a long time, and this is probably why we've had some compatibility issues with the newest edition of Windows. The software program incorrectly displayed system uptime in our case, so it didn't deliver the results we expected. Nonetheless, you can test the utility for yourself, since it's free, lightweight and portable.