How to check responsiveness or activity of a server, website or a network device using the command line utility in Windows and Linux?

How does a data packet reach the right destination from the other side of the globe?

How can we run system routines and subroutines through another program without messing up with third-party binaries and executables?

I  had a problem from a few days ago in my Dell laptop that its system running slow, many times it freezes, many programs disappear on its own without any action, application not running smooth, system file missing. How I remove the virus from my laptop?

I am doing an important assignment in Windows 10 when suddenly my USB mouse stopped working. I am trying many times to scroll my mouse but it does not respond. Because of which I failed to complete my assignment. Then how do I fix my USB mouse?

I am using a desktop that I had purchased 4 years ago. But from few months my CPU getting too hot and overheating, it is misbehaving. Then how can I fix my CPU from overheating?

I am using an OPPO phone since 7 months ago. Therefore, I like its feature but from a few days ago my Android apps are not responding. I cannot able to understand the reason for it. Then, how do I fix an android app that is not responding?

I am using a Samsung 4g handset from one year ago. But from few months my internet connection becomes poor. Therefore I am a university student and more of my work is done online and for this, I need proper internet connection through the day. So, how can I fix my internet connection?

What is hp envy 4502, and how must I fix this in windows 10? What about its general features such as the manufacturer, display diagonal size? Its connectivity, memory, power, RAM and its printing system?

Write about the I/O ports and Memory of hp pavilion h8 1217 CB. Also mention about its power supply, hard drive, memory card reader, software, input, and output devices.