My computer turns off after few minutes of using.

It turns on sometimes and stays on for some specific amount of time then it turns off again

@pokelover How long is that specific amount of time?

I'm assuming you're using an Windows operating system. Is this correct?

Does it also turn off this way when booted into safe mode? When it's on, can you do things like check the Event Viewer/Reliability History/Problem Reports? If so, what do you find there?

If no problems are reported, check Task Scheduler. It may be a "scheduled" shutdown, either accidentally by some program that made a mistake when setting something up, or maliciously by someone trying to mess with you.

@erelectronics it differs, for eg. yesterday, it turned on until the screen lock loading once, and another time, it turned on until my desktop showed, and another time, it was on till quite some time, like, 15-23 min approx. And lastly, it was on for the whole time and I manually shut it down.

Yes, it is windows.

I still did not check in safe mode.

I was able to play games for a while when it was on, so I think I should be able to check those, but I still haven't checked. I will report here once I do.

Ok, I will also check the task scheduler.