Windows 10: my computer problem

hello,My HP computer is an HP Pavilion Laptop 15-cs3xxx. It sometimes gets stuck, and the screen will show that "boot device not found. Please install an operating system on your hard disk", Yesterday, I faced this problem again. I searched the internet and wanted to find out how to solve it. Then I saw a video that said changing the Legacy support to enable it could solve this problem. Therefore, I changed it. However,after I save, exit, and shut down the computer, I turn it on the computer .It has a screen that says to press the esc key for the startup menu,but it is not working. However, i

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Need some advice on computer problems.

Run HDtune (free version) on you hard drive. but most likely that the problem. You can also test your memory with Memtest86 as suggested above

You didn't list your OS

 

Does this computer build have compatibility problems? Opinions welcomed!

Lets start with what you're going to use this computer for, not what you want to put in it.

Rules/steps to building a computer (in chronological order):
First rule: Determine what your needs are.
Second rule: Define your budget.
Third rule: Pick parts.
Fourth rule: Review parts several times.
Fifth rule: Buy said parts.
Sixth rule: Build it.

You are on rule/step 1. Go through the list until you're done.

 

Windows 10 1709 System Restore problems...

That seems to be an attempt at Option 2 in the tutorial, which requires you to
a. Boot to a command prompt (Did you?)
b. You then seem to be mixing steps 3,4 and 5, thus your command is incorrect.

I suggest Option 1 is easier.

If you still have problems, please repost listing each specific step and saying which option from the tutorial you are using. Thanks.