Int 21 Fn 5F86 - LANtastic - Disable Account [N] AX = 5F86h ES:DI -> ASCIZ machine name and password in form "\\machine\password" Return: CF clear if successful CF set on error AX = error code Note: must be logged into the named machine and concurrent logins set to 1 by NET_MGR. Requires system manager to re-enable account.