No matter who you are, whether newbie or veteran, your Windows system will eventually run into problems that aren't so easy to diagnose. It happens on other operating systems too.) When that happens, what will you do?
Reasons for PC diagnostics
Signs that a PC needs to be diagnosed include application or system freezes (when an application or the whole system stops responding to mouse clicks or any other user actions for a brief period of time, but later returns to normal operation), application or system crashes (when an application or the whole system stops responding to user actions and nothing can bring it back to normal operation; application has to be terminated or a PC reboot is required), random computer reboots that are not initiated by the user, various error messages or BSOD ("blue screen of death" or the "STOP Error"), as well as connectivity issues that result in lower internet connection speeds.