Copy Files from a Hard Disk Without a Working OS

A drive can hold readable files even when Windows no longer starts. Avoid reinstalling or formatting it until you have copied the data you need.

Check the disk before writing to it

Power off the affected PC. If the drive clicks, disconnects repeatedly, or is not detected by firmware, further attempts may worsen a physical fault. If it is simply nonbootable, you can try to read it as a secondary drive.

Use another Windows computer

1. Remove the drive following the computer's service instructions, or leave it in place if the PC offers a second boot environment.
2. Choose a USB enclosure or adapter that matches SATA, M.2 SATA, or NVMe. Connect the drive to a working Windows PC.
3. Open Disk Management and confirm the drive's model and capacity. If Windows offers to initialize or format it, cancel.
4. Open File Explorer and browse the old Users folder. Copy personal folders to a different physical drive. Administrator approval may be needed for another Windows profile.
5. Open several copied files and compare folder sizes. Keep the source drive unchanged until the copy is verified.

If the drive is encrypted or unreadable

BitLocker requires the recovery key. If the partition is RAW or the drive returns read errors, do not run formatting or repair commands before assessing the data. A read-only recovery workflow may be needed; a physically failing drive may require professional recovery.

If you cannot remove the drive

Boot the PC from trusted Windows recovery media or a live environment and copy files to an external disk. Confirm the target disk before copying, and avoid commands that clean, initialize, or reinstall on the source.

Frequently Asked Questions

Can a blank Windows PC read the old disk? A working OS on another drive or bootable environment is needed to browse the files.

Should I run CHKDSK first? Not when the only copy of valuable data is on a damaged or unstable drive. Protect data first.

Conclusion

When Windows is missing or will not start, read the old drive from another system or trusted recovery media. Avoid formatting until files are verified elsewhere.

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