xCAT - Anti-Shutdown

xCAT - Anti-Shutdown is a tiny and portable application that enables you to forbid computer shutdown, restart and log off. It runs in the system tray and comes in handy when you want to prevent accidental power options while working or studying. This way, there's no risk of losing unsaved documents or opened tabs in the web browser.

Forbid PC shutdown from the system tray

Once launched, xCAT - Anti-Shutdown gets integrated into the taskbar notifications area for quick access. It forbids PC shutdown by default and gives you the possibility to carry on with your typical desktop activity without any interruptions. From this point on, any attempt to turn off, restart or log off Windows from the Start Menu or Screen becomes futile.
By opening the right-click menu of the tray icon, you can allow and disallow shutdown with one click, as well as trigger a power option even the this action is forbidden by the tool. In this regard, you can choose between normal and forceful log off, reboot and shutdown. There are no other notable options provided by xCAT - Anti-Shutdown.

No setup necessary

The entire program's packed in a single executable file that can be dropped to a preferred directory on the disk or copied to a removable storage unit, in order to directly launch it on any computer without setup.
It doesn't integrate new entries into the system registry, need DLLs or other components to work properly, or create files on the disk without asking for permission. In order to get rid of it, you just have to delete this .exe item.

Evaluation and conclusion

The lightweight software utility had minimal impact on the overall performance of the machine, as we expected, since it needed a low amount of CPU and memory to work properly. No error dialogs popped up and it didn't freeze or crash.
Taking everything into account, xCAT - Anti-Shutdown proves to be a straightforward and practical program for preventing accidental PC shutdown.