The HEINO loader
One small program for the second PC. Sign in, pick your client, launch - it downloads the HMA runtime once and keeps everything current by itself.
Before you launch
Card connected
DMA card in the game PC, USB to the second PC, game running on the game PC.
Sign in
Same username and password as the website. The first sign-in binds the account to this second PC.
Pick the client
International or Chinese, then Launch. The overlay opens on the second PC; drag it onto your fuser output or second monitor.
Loader questions
Windows Defender flagged it
Add the loader folder to Defender's exclusions on the second PC. The game PC is never touched, so nothing needs to change there.
It says "update needed" and restarts
That is the self-update - it downloads the new loader, swaps itself and reopens. Your installed runtime is kept and updated separately when you launch.
"Account locked to a different device"
Your account is bound to the first second-PC you signed in from. Ask support for a HWID reset if you changed hardware.