Windows ReadyBoot Tracing Folder (C:\Windows\Prefetch\ReadyBoot)

Bottom Line: It is 100% safe to delete files inside C:\Windows\Prefetch\ReadyBoot. Deleting .fx trace files will NOT slow down your Windows boot time or corrupt boot configuration settings.

What is the ReadyBoot Tracing Folder?

Located inside the Prefetch directory at C:\Windows\Prefetch\ReadyBoot, this folder is used by Windows ReadyBoot (the boot optimization component of SuperFetch / SysMain).

During the first 120 seconds of computer startup, ReadyBoot logs disk read operations into .fx trace log files (e.g. Trace1.fx, Trace2.fx). ReadyBoot analyzes these boot logs to pre-load frequently launched startup applications into RAM.

On modern NVMe and SATA SSDs, ReadyBoot tracing is redundant, and accumulated .fx trace logs simply take up space.

Can You Delete ReadyBoot Files?

✅ Yes, it is completely safe to delete.

• No boot risk: Your BCD bootloader, system drivers, and startup apps remain 100% safe.
• Auto-rebuilt: Windows will automatically create fresh trace logs if ReadyBoot service is enabled.

How to Safely Clean Up ReadyBoot Folder

Method 1: Delete via Command Prompt (Admin)

1. Open Command Prompt as Administrator.
2. Run the command to purge trace logs:

   del /f /q %WinDir%\Prefetch\ReadyBoot\*.fx

Related Guides

• Learn about deleting [Windows Prefetch folder].
• How to clean up [Windows Temp folder].
• Check if you can clean SoftwareDistribution folder.