It’s not quite that simple, man.
Look, I won't get too bogged down in the weeds here, but one or more heads can go south and start reading things "wonky." Maybe the media itself is getting worn out—honestly, Windows 10 can be pretty demanding on hardware, so maybe the drive just got beat up in certain spots. Or the servo mechanism is failing... there's a whole laundry list of stuff that causes this kind of mess.
That sound you're hearing?
a) Is it the infamous "click of death"? (If the drive sounds like "click, click, click...", well, I don't even need to tell you what that means). If that's the case, you've got about five minutes on the clock before your data is gone forever. Your best bet is taking it to a pro, but expect a bill anywhere from $1,000 to $1667 plus the cost of a new drive. In the absolute worst-case scenario, they have to pull the platters and swap them into an identical drive, which is a massive headache.
b) If it's more of a rattling noise, you probably had a head or a stepper motor snap. That means the data on that specific side of the disk is basically unreachable. Again, we're talking platter swaps.
c) If it’s "just" a loud buzzing, it means the servo mechanism and the heads are still working, but they're struggling to grab certain bits of data (for a million different reasons) and are repeatedly trying over and over. There might actually be some hope for saving things here.
d) It’s also possible the main motor is dying; usually, you'll hear that heavy buzzing speed up and slow down.
Here’s the golden rule when you're dealing with drive drama like this:
1. Have you run chkdsk C: yet? (You know what that is, right?)
2. Some PCs have a built-in option in the BIOS Setup to check the drive
without messing with the actual content. You can run that just to see how many hardware errors you're looking at. You should probably test the SAS/SATA controller and the RAM too, because bad RAM can cause these exact same headaches. The perk here is that it doesn't need the file system; it bypasses it and talks directly to the drive.
3. DO NOT TOUCH THAT DRIVE ANYMORE. Seriously, stop booting from it. Unplug it as your primary drive and set it as a secondary one. If you aren't sure how to do that, grab a USB/SATA adapter—ideally one with its own power supply or a dual USB setup—pop the drive in there, and plug it in as a USB drive (secondary). If you can't figure that out, don't waste any more time; just take it straight to the data recovery pros.
4. Grab a different drive, hook it up as your primary, install Windows 10, and boot from that as your C: drive.
5. In the Disk Manager on your new Windows 10 setup, you should see the secondary drive (your old, busted one) and both of its partitions, though they'll likely have different letters now. If the new drive is C:, then the old C: will become D:, and the old D: will become E:
6. Copy your files over to the new drive. Honestly, Internet Explorer is terrible at these kinds of transfers because it just crashes when it hits a corrupted file. It doesn't have a "retry" option and it won't leave you a log telling you which files failed or how many errors they had so you could try again later. Find yourself a free utility. Windows has robocopy, but that's all command-line/text mode. One of the first free tools that popped up in my search was:
https://www.roadkil.net/program.php?ProgramID=29The other folks mentioned some useful utilities above, too.
Just a heads up: copying this stuff can take hours, or even days, depending on how trashed the drive is.
6. Once you've grabbed everything you can, you'll need to do a full format on the original drive; I mean a long, deep format (which means all your data is gone forever). It's best to do this and resize the partitions right away. This will show you how many errors you're dealing with, though that's not the final count.
It happens all the time where, after multiple formats, the error count keeps changing—it keeps climbing, or sometimes it even drops. That tells you the drive is unstable and it's definitely on its way out.
My advice? Run 4 or 5 long formats to make sure the error count isn't creeping up. That gives you a little peace of mind that the drive, even if it's damaged, is stable. But yeah, it's all super sketchy.
Anything beyond this requires a level of expertise way above yours and most average repair shops or IT guys. Don't try to play hero if you've got a mountain of important data to save.
PS: if you only had about 2GB of free space left on C during the initial install😛articiji, look, it could just be that your C: drive is totally choked out, which is why you can't even get the thing to boot. By default, all your downloads and those pesky browser cache files dump right onto the C: drive. Eventually, that space gets clogged up and ends up taking up way more than just 2GB.