Rufus Access To Device | Denied Windows 7

Windows 7 automatically mounts every volume it detects. Sometimes this causes a sharing violation. Disable automount temporarily.

mountvol -N

To re-enable automount later (recommended): mountvol -E

Windows 7’s generic USB driver (usbstor.sys) can become corrupted.

To Update:

To Rollback (if you recently updated drivers):

If the issue persists, try formatting the USB drive through Windows.

The error message "Access to device denied" essentially means the operating system has forbidden Rufus from sending low-level write commands to the USB drive.

Policies can deny removable disk write access.

Right-click Rufus.exe → Run as administrator. Rufus needs elevated privileges to access raw device sectors. If this fixes it, consider creating a shortcut that always runs as admin:

Ensure you're using the latest version of Rufus. Sometimes, updates include fixes for such issues.