To check, you can use a hidden system tool included with Windows 11, 10, and 7—or download and boot a more advanced tool. Your computer's random access memory (RAM) is its working memory.

you should be able to upgrade the memory without much difficulty. Similarly, if you can see the screws, it is likely the computer can be opened. If you're unsure, check your laptop manufacturer's ...

the computer will restart and check for memory-based problems. If you get any issues there, it will fix it automatically else if no issues are detected, this is probably not the cause of the issue.