Why does my computer say Disk read error? A “Disk read error” on your computer signals a problem with the hard drive, preventing the system from accessing essential startup information.

Rebuild the boot sector. When you are unable to start the computer and see a disk read error, the boot configuration data store (BCD) could be corrupt, missing, or incorrectly configured.

Fix #3: Use your Antivirus software to scan the disk. Scanning your disk with the installed antivirus software on your computer can also be the solution you are looking for.

If you are encountering a disk write error while trying to install something from Steam there are a few steps you can take to troubleshoot the problem.