If Windows has mounted the USB as a “mounted volume” with exclusive access:
On Windows 7, killing Explorer.exe before writing is the single most effective solution for the “access denied” error. If you need a permanent fix, consider upgrading to a lightweight Windows 10/11 environment or switching to Ventoy for USB bootable creation. rufus access to the device is denied windows 7
While Microsoft has officially ended support, ensure your system has at least the update installed. Rufus relies on specific system APIs to format drives; if these are outdated or corrupted, "Access Denied" errors are common. If Windows has mounted the USB as a
Windows Explorer can lock the USB drive when it tries to read its properties or AutoPlay. Rufus relies on specific system APIs to format
Move your Windows ISO file from the USB drive to your or local Downloads folder before starting the process . 3. Clear Drive Conflicts Other software may be "holding" the drive.
: Improper disk layouts (no partition table or MBR) or bad sectors can trigger access errors . Recommended Fixes 1. Grant Administrative Privileges