Windows 10: Exclamation point icon over "C" drive

I posted earlier this week about a computer that had water spilled on it and was giving a "no boot device" error. That has been resolved. The computer can see the drive and will boot into "Normal" mode. I have now discovered that, when looking at "This PC," that there is an exclamation point icon over the "C" drive. I did a search online about this and saw one person recommend enabling and then disabling bitlocker. When I right-click on the drive, there is no "manage" option for Bitlocker. I also saw something about enabling and disabling TPM. This is NOT my computer and I certainly don't want to make the situation worse. I'd appreciate ANY help that can be offered. Thank you.

It may be worth noting that when I took the hard drive out of the computer and attached it one running Windows 7 via USB that I could not access the drive due to Bitlocker being enabled.

:)

 

C Drive icon disapear?

I was trying to install need for speed pro street demo. I install it in C drive directory. Somehow it got currupted.. so I delete the files manually in C drive and reboot and download pro street again.

Now my C drive picture Icon disapear and now it just a white square. Did when I was deleting pro street files in C drive somehow it effect the C drive icon? or did I accidently delete something that is not pro street file?

How do I make my C drive picture Icon back?

 

WiFi Network Icon with exclamation point

When I click on the WiFi icon in the taskbar, it shows a list of available WiFi networks. Some of the networks have an exclamation point in a symbol that looks like a shield. See the picture I posted. Can anyone please tell me what the that mean?

 

WiFi Network Icon with exclamation point

Since this thread is the first one that appears in the Google search results for "exclamation point in wifi system 10 network list" I feel that Microsoft should care enough to answer this question.

How about it?