: Some users have resolved this specific error by manually formatting the USB to FAT32 before starting the process in Rufus.
This is a critical point if you are creating a bootable USB to install Windows 7. Windows 7 does not natively include drivers for USB 3.0 ports. If you create the installer and try to boot from a USB 3.0 port, the installation will fail with a because the operating system cannot access the drive at startup. rufus access to device denied windows 7
2. Disable Background Monitoring Software (Antivirus/Windows Defender) : Some users have resolved this specific error
The error in Rufus on Windows 7 typically occurs because another program or system service is locking the USB drive, or the user lacks the necessary administrative permissions to modify the drive's partition table. While Windows 7 is an older operating system, Rufus continues to be a popular tool for creating bootable media, provided you use a compatible version (Rufus 3.22 is the last to officially support Windows 7). Immediate Solutions for Rufus "Access Denied" If you create the installer and try to boot from a USB 3
End tasks for any software that interacts with storage drives (e.g., Acronis, MiniTool, or file compression utilities).
If basic workarounds fail, the problem likely stems from deep-rooted partition errors or local group policy restrictions. Clean the USB Drive via Diskpart
: If the drive's layout is corrupted, use a dedicated tool like Windows Disk Management to "Delete Volume" and recreate a primary partition before running Rufus again.