While this is a rare issue, if your PC is failing to boot up or freezing during the Windows startup process after installing the Anti-cheat, this guide covers the most common hardware configurations and conflicts that can cause it.
1. Blue Screens During Boot
If your system boot failure results in a Blue Screen (BSOD) accompanied by an error code, the problem is likely related to specific driver conflicts occurring during startup.
We have a dedicated guide to help you identify and resolve these specific startup crashes. Please refer to our main article here: Troubleshooting blue screens
2. GPU Issues with "Above 4G Decoding"
Users may experience system boot freezes or black screens due to memory management conflicts between IOMMU (Input-Output Memory Management Unit) and a motherboard BIOS setting known as "Above 4G Decoding".
This is known to occur in two specific cases:
Dual GPU Configurations: Systems running integrated graphics alongside a discrete (dedicated) GPU.
AMD Radeon RX 6600: Systems utilizing this specific dedicated graphics card.
To resolve this:
Restart your computer and enter your BIOS/UEFI settings (usually by pressing Del, F2, or F12 during startup).
Locate the Above 4G Decoding setting (often found in the PCI Subsystem Settings or Boot/Advanced menus).
Set Above 4G Decoding to Disabled.
Save your changes and exit the BIOS to see if Windows boots successfully.
3. RAID Configurations and IOMMU Compatibility
If your system uses a RAID configuration for its storage drives, certain RAID drivers may have compatibility issues with IOMMU. On specific system configurations, this hardware-level conflict can completely prevent Windows from booting.
Because the Anti-cheat requires IOMMU to be enabled, turning off your RAID configuration may be necessary to permanently resolve this conflict. As a temporary workaround to successfully boot your PC into Windows, you can disable IOMMU in your BIOS (see the steps in section 4 below).
Important Note: Because disabling RAID can break existing storage arrays and potentially lead to data loss or require a full reinstallation of Windows, we do not provide step-by-step instructions for this process. We strongly recommend backing up your data and consulting your motherboard's manual or a qualified hardware technician if you choose to make this change.
4. Disable IOMMU and Contact Support
If you have tried the steps above and your system is still failing to boot, the issue may be a deeper conflict with how your motherboard handles IOMMU.
As a temporary workaround to get your operating system to boot again, you can disable IOMMU completely:
Enter your BIOS/UEFI settings.
Locate the IOMMU setting (sometimes labeled as Intel VT-d or AMD IOMMU under Advanced CPU or Chipset settings).
Set it to Disabled.
Save your changes and restart your PC.
If disabling IOMMU allows your system to boot, or if you are still experiencing boot failures, our support team needs to investigate your specific hardware configuration. Please submit a support ticket here.