Before a game or program is installed, you're prompted to select an installation directory. This directory is assigned a hard drive letter. By default, this is your C: drive:
The Invalid Drive error appears for one of these reasons:
- The hard disk your operating system is installed on has changed (drive C: is most common) or the drive letter of the DVD-ROM or CD-ROM has changed since a prior install of a program.
- There’s an incorrect value in the Data filed of a registry key.
Try the troubleshooting steps below to resolve the issue.
Change your hard drive letter
Here are steps to change your hard drive letter which may resolve the issue:
- Click Start.
- Type "Disk Management", and then press Enter.
- Right-click the drive that had its letter modified, and then click Change drive letter and paths.
- Click Change.
- Change the letter back to the original one. Typically this is C:.
- Click OK.
- Try installing the Epic Games Launcher.
Fix bad registry entries
- Click Start.
- Type "Settings", and then press Enter to open the Settings panel.
- Click Update & Security.
- On the Recovery tab, click Advanced Startup, and then click Restart now.
- Next, you will see Windows 10 Advanced Startup.
- At the Choose an option screen, click Troubleshoot.
- At the Advanced Options screen, click Automated Repair.
- Choose an account and log in when prompted to do so.
Automatic Repair should now start and your computer may reboot during this process.