Why this Warning triangle on my C drive icon?

1.Low Disk Space: If your C drive is running low on available space, Windows may show a warning symbol. You can check your disk usage by right-clicking the drive in File Explorer, selecting "Properties," and viewing the available space.
2.Drive Errors: There may be errors on the disk itself. Running the built-in Windows utility to check for disk errors might resolve this. To do so, right-click the C drive, select "Properties," go to the "Tools" tab, and click on "Check."
3.Corrupted File System: If there are issues with the file system, it may also be indicated by a warning. You can use the Command Prompt to run a command like chkdsk /f C: to check and fix issues.

The most common reason for a warning triangle is running low on disk space. If your C drive is almost full, Windows may be indicating that you need to free up space.

Projector? Can't you move it?

If BitLocker is enabled and there is an issue with the encryption status (such as encryption not being completed or being paused), a warning triangle might appear.

You'd better back up the disk as it is a dangerous sign. After that, run a disk scan to troubleshoot the potential issue.

ow Disk Space: The most common reason for a warning triangle is that your C drive is running low on disk space. Check your available storage and consider deleting unnecessary files or running a disk cleanup.

File System Errors: There may be issues with the file system on the drive. You can run the built-in Windows utility called Check Disk (chkdsk) to scan and repair file system errors:

Open Command Prompt as an administrator.
Type chkdsk C: /f and press Enter. This will schedule a disk check the next time the system restarts.

Please run a SFSCAN. It seems something wrong with the BitLocker drive.

It means the drive is encrypted by BitLocker.