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Guides and buying advice, written by us. We update them when things change.

Guides

Step by step, for when you are building or fixing something.

Troubleshooting

VCRUNTIME140.dll was not found: what it means and the fix

Your DMA software needs Microsoft's Visual C++ runtime, and your second PC doesn't have it. Install it from Microsoft's own site, then restart.

phantom · Oct 1, 2026

Unknown USB Device (Device Descriptor Request Failed): what it means and the fix

Windows on your second PC saw your DMA card but couldn't read what it is. Usually it's the cable, the USB port or a stuck card. How to fix it.

phantom · Oct 1, 2026

Unable to load 'FTD3XX.dll' or 'leechcore_driver.dll': what it means and the fix

Your DMA software can't find the FTDI file it uses to talk to the card. It's a file missing from the software's folder, not your card or your cable.

phantom · Oct 1, 2026

Unable to retrieve required Device PCIe ID: what it means and the fix

Your second PC reached the DMA card, but the card isn't linked to your main PC's slot. Cold boot, check the lights, reseat it and try another slot.

phantom · Oct 1, 2026

PC won't boot after installing a DMA card? How to fix it

No picture, a debug light stuck on, a boot loop or straight into the BIOS after fitting a DMA card. What each one means and how to fix it, in order.

phantom · Oct 1, 2026

BitLocker recovery key after installing a DMA card: what to do

BitLocker asking for a 48-digit recovery key after you fitted a DMA card or changed the BIOS? Where to find the key, and what to do if you can't.

phantom · Oct 1, 2026

DRIVER_VERIFIER_DMA_VIOLATION: what it means and the fix

A blue screen with stop code 0xE6 on a PC with a DMA card. What it means, how to check if the card is the cause, and what to send us.

phantom · Oct 1, 2026

USB To UART+JTAG in Device Manager: what it means and the fix

USB To UART+JTAG under Other devices is your DMA card's JTAG port without its driver. Install the CH347 driver in MewTools and its dot turns green.

phantom · Oct 1, 2026

FTDI SuperSpeed-FIFO Bridge with a warning: how to fix it

FTDI SuperSpeed-FIFO Bridge under Other devices means your DMA card's data driver isn't installed. Install it from MewTools in one click.

phantom · Oct 1, 2026

Failed to initialize DMA: what it means and the fix

Your DMA software couldn't start its connection to the card. Restart both PCs, then check the data port, the FTDI driver and other programs.

phantom · Oct 1, 2026

[SYMBOL] Offline symbols unavailable - file 'info.db' not found. What it means and the fix

A file is missing from your DMA software's folder and it couldn't download symbols either. Extract everything, check your antivirus and connection.

phantom · Oct 1, 2026

Unable to locate valid DTB: what it means and the fix

Your DMA software connected but can't find Windows in your main PC's memory. Check for TINY PCIe TLP, cold boot, then make a memory map.

phantom · Oct 1, 2026

Failed to retrieve Physical Memory Map! What it means and the fix

Your DMA software couldn't read where your main PC's RAM sits. Usually the USB link is unstable. How to check the link, and when a memory map helps.

phantom · Oct 1, 2026

FPGA: ERROR: Unable to connect to USB/FT601 device: what it means and the fix

Your second PC can't reach the DMA card's data port. Check the cable is on the data port, the FTDI driver, other programs, power and the USB port.

phantom · Oct 1, 2026

[FAIL] VMM INIT FAILED. What it means and the fix

VMM INIT FAILED means your DMA software couldn't start reading your main PC. Check the log for TINY PCIe TLP, cold boot, then the cable, port and BIOS.

phantom · Oct 1, 2026

FPGA: TINY PCIe TLP Algorithm auto-selected! What it means and the fix

Your DMA software fell back to tiny, slow reads because the card can't read memory. Most of the time you haven't run the activator. How to fix it.

phantom · Oct 1, 2026

DMA error messages: what each one means and how to fix it

Look up your DMA error by its exact text, like VMM INIT FAILED or TINY PCIe TLP algorithm auto-selected. What each one means and how to fix it.

phantom · Oct 1, 2026

Low DMA speed? How to fix a slow DMA card

A slow DMA card is usually the cable or the USB port, not the card. What a good speed test looks like, and how to fix a slow one step by step.

phantom · Sep 30, 2026

DMA software won't start or connect? Fixes on your second PC

DMA software won't open, won't log in or can't reach your card? The runtimes, clock, driver, activator and antivirus checks to do on your second PC.

phantom · Sep 30, 2026

DMA memory map (mmap.txt): what it is and when you need one

What a DMA memory map is, the errors that mean you need one, like "Unable to locate valid DTB", how to make mmap.txt for Blurred, and when to make a new one.

phantom · Sep 30, 2026

MewTools blocked by Windows? How to fix it

Windows SmartScreen, Smart App Control or your antivirus stopped MewTools from opening? Why it happens, and how to let it run on your second computer.

phantom · Sep 21, 2026

DMA card not working? Fixes for VMM INIT FAILED

DMA card not showing in Device Manager, VMM INIT FAILED, FT601 errors or a failing speed test? Start with a cold boot, then check the port, cable and slot.

phantom · Sep 17, 2026

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