I was playing Roblox on my laptop the last time I used it, and when I tried to turn it on today, it just wouldn't start up. The first message I got was about a problem that needed a restart, then I saw an error code '0xc00021a', followed by 'INACCESSIBLE BOOT DEVICE'. Now, it keeps saying it's in automatic repair mode, but it just hangs there. I'm really confused about computers and could use some advice on what to do next!
3 Answers
Just a side note, since you mentioned it was a laptop—don't worry about calling it a PC! It's all good. And if you think the storage drive is failing, that's usually where games and files are stored, so it's a valid concern.
It sounds like your storage device might be dead. I recommend creating a USB rescue environment and booting from it to test your drive. If you have another computer, you can also take the drive out and connect it via a USB dock. Using software like Crystal Disk can help you check its health. If the drive has failed, you’ll need to replace it and reinstall Windows to get back on track.
You might want to consider taking it to a computer repair shop. It seems like your laptop isn’t able to read the storage drive needed to boot. If you're not comfortable opening it up yourself, there are plenty of tutorials on YouTube that show you how to do it safely.

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