If the product starts fine but ESP freezes, menus stop responding, or the process dies after a few minutes, you're usually looking at one of two things: anti-cheat blocking your firmware, or an unstable DMA / USB connection.
To test whether anti-cheat is blocking the firmware: launch the game and play for 3–5 minutes until ESP drops, then close the game and run a standalone DMA speed test. If the speed test passes once the game is closed but fails while the game is open, the game's anti-cheat is blocking your firmware. Fix: use a different firmware that isn't flagged.
To test for an unstable connection: open Device Manager on the second PC and leave it open. Play until the problem happens. The moment ESP drops, check Device Manager — if it flashes and refreshes, your DMA card briefly disconnected over USB. Try a different USB port on the second PC first, then a different cable. If it keeps happening on known-good cables and ports, suspect the DMA card or its firmware.
If neither matches, check C:\PureDMA\dayzdmalog.txt for the last stage reached and open a ticket with the log and your firmware details.