How to Recover Files from a Windows PC That Won't Boot

Theo Lucia updated Jul 17, 26

5 min(s)

TL;DR:

To recover files from an unbootable Windows PC, immediately stop repeated restart or startup repair attempts to prevent data overwriting, and either connect the removed drive to a working computer using a SATA or USB adapter or start the system with bootable recovery media.
    ● Halt all DIY procedures and seek professional diagnosis if the drive is not detected in the BIOS/UEFI or exhibits physical hardware damage signs such as clicking, grinding, liquid exposure, or burning smells.
    ● BitLocker-encrypted drives strictly require the correct password or recovery key before access, and SSD recoveries may yield limited results if TRIM processes executed after a reset or deletion.
    ● If the drive opens normally but partitions are inaccessible or files are missing, run software like Recoverit Windows System Recovery from a working environment and save all extracted data to a completely different physical drive.

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Files can often be recovered from a Windows PC that will not boot by removing the drive, connecting it to a working computer, or starting the PC from recovery media instead of the internal system disk. Recovery chances depend on drive condition, encryption, and whether new data has been written after the problem started.

Step 1
Power off the computer and stop repeated restart attempts. Repeated boot repair, resets, or reinstalls can write new data and reduce recovery chances.
Step 2
Check for hardware warning signs before any DIY recovery. Clicking, grinding, a burning smell, liquid exposure, or a drive that disappears intermittently can indicate physical damage. In that case, stop testing and consider professional diagnosis.
Step 3
Try access from outside Windows. Remove the internal drive and connect it to another Windows PC with a SATA or USB adapter, boot the unbootable PC from a recovery USB or live system, or use BIOS/UEFI to confirm whether the drive is detected.
Step 4
Copy important files first if the drive opens normally. Save the copied data to a different physical drive, not back to the same disk.
Step 5
Run data recovery only if files are missing, partitions are inaccessible, or the file system is corrupted. Scan the affected drive from a working environment and save recovered files to another drive.

Option	Best For	Limitation
Connect drive to another PC	Fast access to user files	Requires opening the computer or an adapter
Boot from recovery media	Laptop or sealed device	Drive must still be readable
Data recovery scan	Deleted, formatted, or inaccessible files	Results may be limited if data was overwritten
Professional service	Physical damage or non-detection	Higher cost and no universal guarantee

Common Issues and Fixes

Drive not detected in BIOS: likely cause is hardware failure, loose connection, or damaged port; fix is reseating the drive once and stopping if detection still fails.
BitLocker-encrypted drive: likely cause is encryption lock; fix is using the correct password or recovery key before file access.
SSD shows empty or missing files: likely cause may include TRIM after deletion or reset; fix is stopping use immediately, though recovery may be limited.
“Access denied” folders after connecting to another PC: likely cause is Windows permissions; fix is taking ownership carefully or using an admin account.
Recovery scan freezes or errors out: likely cause is unstable drive health; fix is minimizing repeated scans and considering a disk image or professional help.

Quick Tips

Recover data from an unbootable PC before reinstalling Windows whenever possible.
Save recovered files to an external drive with enough free space.
If Windows won’t start data recovery is still possible, but success depends on whether the storage hardware still reads reliably.
For RAID, NAS, or Linux-based systems, avoid rebuilding or reinitializing storage before recovery.

Protip:

Recover files from another computer or bootable media before reset, reinstall, or startup repair changes the system drive.