--- title: How to Repair a Non-Booting System with Horizon DataSys Fix Tools description: Learn how to use Horizon DataSys Fix Tools to restore MBR, BCD, and EFI backups. Follow our step-by-step guide to recover your system and resolve boot issues. --- [Skip to content](https://support.horizondatasys.com/knowledge-base/how-to-repair-a-non-booting-system-with-horizon-datasys-fix-tools#main-content) [Submit a Ticket](https://support.horizondatasys.com/knowledge-base/kb-tickets/new) [Support Portal](https://support.horizondatasys.com/tickets-view) [![Horizon DataSys - Making It Simple](https://support.horizondatasys.com/hs-fs/hubfs/HorizonDataSys_logo-tagline.png?width=175&height=38&name=HorizonDataSys_logo-tagline.png)](https://horizondatasys.com/) - [Tickets](https://support.horizondatasys.com/tickets-view) - [Knowledgebase](https://support.horizondatasys.com/knowledge-base) - [Login](https://support.horizondatasys.com/_hcms/mem/login) Open main navigation Close main navigation - [Tickets](https://support.horizondatasys.com/tickets-view) - [Knowledgebase](https://support.horizondatasys.com/knowledge-base) - [Login](https://support.horizondatasys.com/_hcms/mem/login) - [Submit a Ticket](https://support.horizondatasys.com/knowledge-base/kb-tickets/new) - [Support Portal](https://support.horizondatasys.com/tickets-view) - [Contact us](https://horizondatasys.com/contact/) [Contact us](https://horizondatasys.com/contact/) How can we help you? - There are no suggestions because the search field is empty. 1. [Horizon DataSys Knowledge Base](https://support.horizondatasys.com/knowledge-base) 2. [Troubleshooting](https://support.horizondatasys.com/knowledge-base/troubleshooting) July 23, 2026 # How to Repair a Non-Booting System with Horizon DataSys Fix Tools ## Important: Please only utilize the Fix Tools for Reboot Restore (Standard and Enterprise) or RollBack Rx Pro if specifically instructed to do so by a Horizon DataSys support representative. Following these steps will assist in restoring your system's Master Boot Record (MBR) and boot configuration using the Horizon DataSys Fix Tools. ### Phase 1: Preparation 1. **Download the Fix Tools:** [Download the FixTools v12.zip](https://horizondatasys.com/downloads/Tools/FixTools_v12.zip) archive. 1. The file includes the following file: RecoveryTools\_USB.iso 2. **Create a Bootable USB:** For this step we will use a third-party utility called **Rufus** ([download from rufus.ie](https://rufus.ie)). Once downloaded, insert your USB key and double-click on *rufus-4.14.exe* (accept the warnings)  1. Under the Disk Partition section, your USB key should be selected. 2. Click on SELECT, browse for the *RecoveryTools\_USB.iso* under the Boot Selection from the Rufus program 3. **Boot from USB:** Restart your PC and enter the BIOS/UEFI settings. Ensure the system is set to boot from the USB device you just created the bootable drive from. > **Note:** Depending on your hardware, you may need to enable **Legacy Mode** (CSM) in your BIOS settings to successfully boot the recovery environment. ### Phase 2: Recovery Sequence Once the Fix Tools menu has loaded, perform the following actions in order: 1. **Decrypt Partition(s):** Run this utility first. If an error occurs, your drive is likely not encrypted; you may safely skip this step and proceed. - Say YES to are you sure to decrypt partitions(s) 2. **Restore MBR Backup:** Select **Browse > Computer > Local Disk**. - For version 13: Navigate to `C:\Program Files\Reboot Restore Enterprise` and select the `shield.dat` file. - For version 12: Navigate to `Program Files\Shield` and select the `shield.dat` file. - If you get a an error or cannot find the Local Disk, refer to section below *Troubleshooting: Local Disk Not Visible* 3. **Restore BCD Backup:** Select **Browse > Computer > Local Disk** and navigate to the `\Windows` folder. 4. **Restore EFI Backup:** Select **Browse > Computer > Local Disk** and navigate to the `\Windows` folder. - *Note: If an error occurs here, your system may not be using an EFI partition; you can safely skip this step.* 5. **Restore Registry Backup:** Select **Browse > Computer > Local Disk** and navigate to the `\Windows` folder. 6. **Finalize:** Click **Exit**, remove the USB drive, and attempt to boot into Windows normally. ![](https://support.horizondatasys.com/hs-fs/hubfs/image-png-May-05-2026-11-14-30-7647-PM.png?width=583&height=495&name=image-png-May-05-2026-11-14-30-7647-PM.png)   ### Troubleshooting: Local Disk Not Visible If your local drive is not visible during the "Restore MBR" process, you must manually assign a drive letter within the WinPE environment: 1. Navigate to the **Start** menu and right-click **This PC**. 2. Select **Manage** to open Computer Management. 3. Go to **Storage > Disk Management**. 4. Locate your primary drive in the list. If it is present but has no letter, right-click the partition and select **Change Drive Letter and Paths**. 5. Assign a drive letter (e.g., C:), then return to the **Phase 2: Recovery Sequence** instructions above. - [News and Updates](https://support.horizondatasys.com/knowledge-base/news-and-updates) - [Reboot Restore Enterprise & Standard](https://support.horizondatasys.com/knowledge-base/reboot-restore-enterprise-standard) - [RollBack Rx Pro](https://support.horizondatasys.com/knowledge-base/rollback-rx-pro) - [Endpoint Manager](https://support.horizondatasys.com/knowledge-base/endpoint-manager) - [Troubleshooting](https://support.horizondatasys.com/knowledge-base/troubleshooting) - [FAQs](https://support.horizondatasys.com/knowledge-base/faqs) Copyright © 2025, Horizon DataSys Corporation