Computer has a host of problems-- is this a bad hard drive?

Alice0

Prominent
Jul 8, 2017
1
0
510
Hey all. I'm a lifetime PC user but I'm not as familiar with the hardware side of things, so I was hoping some of you folks could help me figure out if this "diagnosis" is correct.

I bought an HP Envy off a relative, since it ran well at first glance. Soon I realized how buggy it was; programs and Windows components would stop working, and I was constantly getting errors about missing DLLs, no matter how many times I redownloaded them. My whole OS stopped working a couple times; I'd end up in a startup loop and none of Windows' built-in recovery options would work.

Disk check always catch disk errors, and it occasionally claims to fix them, but they're always back. Also I noticed that both the built-in defragmenter and Defraggler didn't seem to be able to read the disk right. They'd both give random percentages for how fragmented the disk was, and then claim to be defragmented in <10 seconds. Of course if you scanned it again right after, it would show it as even more fragmented.

Of course I've ruled out malware (Avast, Malwarebytes, and Windows Defender found nothing, including boot scans). And I've tried clean installs, different editions of Windows 10 from different sources. They always have these glitches right out of the box. That's why I think it's a hardware problem. Possibly heat damage, this thing was full of cat hair when I bought it.

My friend told me it sounded like hard drive failure. Recently it's developed more issues that don't sound necessarily disk-related to me-- random graphics going black, and general nonresponsiveness-- but I don't have those problems when running from a live USB.

Anyway thanks for reading, hope I didn't hit you with a bunch of noob nonsense.