C Drive Missing in Windows 10

Thanks Jesse,

Something seems off though.
The controller is Intel, but you have an AMD machine (per your specs)

I want to be certain of your machine:
Please follow this tutorial to provide the current operating environment of your machine.
Speccy - Publish Snapshot of your System Specs

Thanks

Jesse Williams said:

This is my sister's computer. It's an Acer Aspire 5749Z Laptop with Intel. Mine is an Acer Aspire 5250 with AMD.

Aha! - my mistake ... you did reference the machine in post#1 - my apologies.

I'll wait for the Speccy report then.

Jesse Williams said:

Yes, time and time again. It fixes it while the computer is on by putting the C: drive back in the optimization control panel, but then when I boot it back up, it's gone again, and the action center asks me to scan the drive again for errors.

Navy is on to something methinks!

How are you running Chkdsk?
If the drive is a spinner (not an SSD)
Try
Command Prompt (Admin) > Chkdsk C: /R
Answer Yes to schedule at next restart
Restart the machine

I didn't see anything in the Speccy - thanks for that

I asked about how you ran Chkdsk - no response from you, so I'll wait.

Jesse Williams said:

It came up in the Action Center and said to scan drive for errors. Did that, but it didn't report anything. Then I went through the Control Panel to scan for errors. It fixed it by putting the C: drive back in the Optimization area. But then when I turned it back on the next time, the C: drive was missing again. So I am unsure of what is going on.

I'm not sure what you mean
Control Panel to scan for errors

but did you follow my suggestion in post# 15

Command Prompt (Admin)
Chkdsk C: /R
Answer Yes to schedule at next restart
Restart the machine