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Head-to-head · System Restore Software

Unified Write Filter vs Phantosys vDisk

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score Unified Write Filter #2 in System Restore Software 9.0/10 Pricing on request ✓ 1 of 3 features Visit Microsoft
Phantosys vDisk #3 in System Restore Software 7.9/10 Pricing on request ✓ 1 of 3 features Visit Phantosys

Unified Write Filter leads on 0 checks, Phantosys vDisk on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreUnified Write Filter · 9.0/10

Unified Write Filter scores higher on our rubric for system restore software: 9.0 against 7.9 out of 10; our editors rank them #2 and #3.

On platform support, Phantosys vDisk gives you Cross-platform where Unified Write Filter offers Windows-only.

Unified Write Filter is the better fit for windows devices requiring enterprise write filtering. Phantosys vDisk is the better fit for cross-platform organizations needing managed rollback.

  • Unified Write Filter fits best

    Windows devices requiring enterprise write filtering

  • Phantosys vDisk fits best

    Cross-platform organizations needing managed rollback

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Side by side

Feature Unified Write Filter 9.0/10 Visit ↗ Phantosys vDisk 7.9/10 Visit ↗
At a glance
Editor score 9.0 7.9
Ranking #2 in System Restore Software #3 in System Restore Software
Best for Windows devices requiring enterprise write filtering Cross-platform organizations needing managed rollback
Pricing model Paid Paid
Starting price Pricing on request Pricing on request
Free plan Not checked yet Not checked yet
Free trial — —
Deployment Desktop Cloud, Desktop
Platforms Windows Windows, Linux
Support Docs Docs
Integrations 2 integrations 1 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Unified Write Filter 1/3 · Phantosys vDisk 1/3
Kiosk mode — Not checked yet
Classroom controls — Not checked yet
Central management ✓ ✓
Specs
Restore trigger Reboot Reboot
Rollback scope Full-volume Full-volume
Protected devices Not checked yet Not checked yet
Platform support Windows-only Cross-platform
Our review
Pros
  • Reboot-cleared overlays restore protected volumes to a clean state
  • Supports file, folder and registry-key exclusions
  • Local and remote management through uwfmgr.exe, CSP and WMI
  • Runs virtual disks on physical PCs without a hypervisor
  • Snapshots, versioning and full-volume rollback support recovery
  • Encryption, peripheral controls and Active Directory integration
Cons
  • Runs only on Windows
  • Requires Enterprise, Education or IoT Enterprise editions
  • Reboot is the standard trigger for clearing the overlay
  • Commercial licensing requires a sales contact
  • Recovery is tied to reboot or manual action
  • Support is provided through documentation
Our verdict

Unified Write Filter (UWF) is an optional Windows feature that intercepts writes to protected volumes and redirects them to a temporary or persistent overlay. After a reboot, the temporary overlay is cleared so the device returns to its…

Read the review →

Phantosys vDisk provides centrally managed virtual-disk images for Windows and Linux computers. The images run directly on physical PC resources without a hypervisor, while local caching lets clients continue operating without a permanent…

Read the review →
  1. Unified Write FilterSystem Restore Software 9.0Pricing on request
  2. Phantosys vDiskSystem Restore Software 7.9Pricing on request

Strengths and trade-offs

  • Unified Write Filter — where it wins

    • Reboot-cleared overlays restore protected volumes to a clean state
    • Supports file, folder and registry-key exclusions
    • Local and remote management through uwfmgr.exe, CSP and WMI

    Where it doesn't

    • Runs only on Windows
    • Requires Enterprise, Education or IoT Enterprise editions
    • Reboot is the standard trigger for clearing the overlay

  • Phantosys vDisk — where it wins

    • Runs virtual disks on physical PCs without a hypervisor
    • Snapshots, versioning and full-volume rollback support recovery
    • Encryption, peripheral controls and Active Directory integration

    Where it doesn't

    • Commercial licensing requires a sales contact
    • Recovery is tied to reboot or manual action
    • Support is provided through documentation

More comparisons

All system restore software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update