Hidden Utilities in windows

Windows Memory Diagnostic

Windows includes a Memory Diagnostic tool that can restart your computer and test your memory for defects, like the popular MemTest86 application. If you want to check your computer’s memory for errors, you don’t need a third-party tool — just open the Windows Memory Diagnostic tool.

Resource Monitor

The Resource Monitor application offers a detailed look at your computer’s resource usage. You can view computer-wide CPU, disk, network, and memory graphics, or drill down and view per-process statistics for each type of resource.

This means that you can see which processes are using your disk or network heavily, view which processes are communicating with which Internet addresses, and more. The Resource Monitor provides much more detailed resource statistics than the Task Manager does.

                                                                                                                                                                      

Disk Cleanup

Windows’ Disk Cleanup utility isn’t quite as hidden as some of the other utilities here, but not enough people know about it. It will scan your computer for files that can be deleted, from temporary files and memory dumps to old system restore points and leftover files from Windows upgrades. It does the same job a PC cleaning utility does, but it’s free and doesn’t try to extract any money from you. Advanced users may prefer CCleaner, but Disk Cleanup does a decent job.

Access it by searching for Disk Cleanup at your Start screen or Start menu.