What is included in O&O DiskImage 21 Premium?

Full system imaging — Back up the entire PC in one click.
Drive cloning — Copy a whole disk when upgrading to SSD.
Hardware-independent restore — Restore a system image onto different PC hardware.
Incremental imaging — Capture only changed data to save space.
Core Capacity — Images to DiskImage, VHD, and VHDX formats.
Important — Commercial use and Windows Server support not included.

What are the main benefits of O&O DiskImage 21 Premium?

O&O DiskImage 21 Premium is Windows backup and disk-imaging software for home users that creates full system images, drive clones, and file-level backups. It brings a complete PC back after a disk failure, ransomware incident, or a broken Windows update, and can restore even onto new hardware.

One-click imaging — Back up every attached drive without manual selection.
Bootable rescue media — Restore Windows even when it will not start.
Hotplug automation — Connecting a USB drive can trigger a backup.
NAS detection — Network storage on the LAN is preselected automatically.
Redesigned interface — Tile-based layout replaces the old tabbed window.
Encryption and compression — Protect and shrink backup image files.

Data loss is expensive: How backups help you avoid outages
For more background on backup planning, read our guide:

What does O&O DiskImage 21 Premium do?

It creates image-based backups of an entire Windows PC, individual drives or partitions, and single files or folders, and can clone a disk directly onto a new one. From those images you can restore a full system, a single partition, or selected files after a disk failure, ransomware attack, or a failed Windows update. It also converts images to VHD and VHDX, so a backup can be mounted or run as a virtual drive. The Premium edition uses the same imaging engine as the Professional and Server versions but wraps it in a simplified, tile-based interface for home users.

Who is O&O DiskImage 21 Premium best suited for?

It is built for private Windows 10 and 11 users who want to protect one personal PC without learning a technical backup console. The redesigned interface reduces a backup to choosing the whole PC, a drive, or files, then a destination, which suits users who previously avoided imaging tools. Advanced settings such as imaging method, compression, and encryption are still available for those who want manual control. For use across a company network or on several managed machines, the Professional edition is the correct choice instead.

What is the difference between the Premium, Professional, and Server editions?

All three editions share the same backup formats and imaging technology, so images can be restored across editions. The Premium edition is a single-user product for private PCs and does not cover corporate network use or multi-user management. The Professional edition adds use in company networks and multi-user, multi-device management for IT professionals, but is still not intended for server operating systems. The Server edition adds Windows Server support, backup of virtual machine environments, and extended network backup options. The table below summarizes the practical differences.

Does O&O DiskImage 21 Premium support Windows Server and commercial business use?

No. The Premium edition is intended for private, single-user use and does not include Windows Server operating system support or use inside a corporate network. To image a machine running Windows Server, only the Server edition supports server operating systems. For commercial desktop use or managing backups across multiple company PCs, the Professional edition is required. Choosing Premium for a business environment would leave you without the multi-user and network features those setups depend on.

Can O&O DiskImage 21 Premium restore a backup to a new or different PC?

Yes. Its Machine Independent Restoration (M.I.R.) feature adapts a system image so it can boot on hardware different from the original machine, which helps when moving Windows to a new PC or replacing a failed mainboard. You create a bootable rescue medium in advance, start the target PC from it, and restore the image even when Windows will not load. Restores work on both UEFI/EFI and BIOS systems and support GPT disks and SSDs. Some driver adjustments can still be needed after a major hardware change, so the process is not always fully automatic.

Frequently asked questions about O&O DiskImage 21 Premium

Does O&O DiskImage 21 Premium support incremental and differential backups?

Yes. It runs full, incremental, and differential images, so after the first full backup it writes only changed data, which lowers backup time and storage use. This makes frequent scheduled backups of a large system drive practical without quickly filling the destination disk.

Can O&O DiskImage 21 Premium save backups to a NAS or external drive?

Yes. It backs up to external USB drives, network shares, and NAS devices, and version 21 automatically detects and preselects NAS devices found on the local network. A hotplug rule can also start a backup automatically when a specific external drive is connected, which suits users who prefer to back up by simply plugging in a disk.

Which Windows versions does O&O DiskImage 21 Premium run on?

It runs on Windows 10 and Windows 11, including the changes introduced in Windows 11 version 24H2. It does not support Windows Server operating systems, which require the Server edition instead. This matters if you plan to protect a small-business server, as the Premium license will not cover that system.