Last Known Good Time

Last Known Good Time is a simple-to-use command-line application that reveals the last time when the operating system recorded optimal working conditions for the computer.

Requires minimal experience with console tools

It gives you the possibility to restore the OS to a previous state, in case it's no longer running properly due to various reasons, such as faulty Windows Updates, malware attacks, or numerous software installations that eventually interfered with the registry configuration.
Console tools are typically preferred by experienced PC users, since they only need to write a couple lines of code to carry out tasks in no time. Unlike other tools, this one doesn't contain complex command-line arguments, making it accessible even to less experienced users.

Discover the last good configuration recorded by the PC

After calling its process from a Command Prompt dialog, the utility automatically detects and displays the control set modification times at startup, namely the last recorded good time and date, current one, and last failed one (if any).
There are three conditions that must be met in order to consider a computer boot successful. There mustn't exist any critical system errors for the driver or system file, all autostart services must be able to launch without any issues, and a PC user must be able to successfully log into Windows at least once.

No setup necessary

There is no installation kit involved, which makes Last Known Good Time portable. You can copy the downloaded files to a custom directory on the disk or to a removable storage unit, and directly launch it on any PC without setup. It doesn't add new entries to the system registry and has the source code in the downloaded package.

Evaluation and conclusion

It worked smoothly in our tests, without triggering the OS to hang, crash or indicate errors. System resource consumption was minimal. All in all, Last Known Good Time offers a straightforward solution for learning the last good configuration recorded by the PC.