For reproducing this, simply download AC97 VirtualBox driver from Rapps, extract it in C:\ReactOS and try to install it via Device Manager by selecting "Multimedia audio device".
Up to 0.4.13-dev-546-gf565083d589c93792ded2a7b28a40d99020efad2 it installs without any problems. Since 0.4.13-dev-547-g99fa38809fd8ed38d4d59fa1fcf3babb3216b895 once the installation starts, the system immediately crashes to BSOD 0x1e.
In debug mode, first appears an exception, and only after bt and cont, appears Fatal System Error 0x1e:
There are many lines associated with portcls driver. After replacing portcls.sys on version from Win2k3, the installation completes succesfully even in 0.4.13-dev-547-g99fa388, without any failures. So problem is indeed only in our portcls driver.
P.S.: I could to install AC97 driver successfully only once in 0.4.13-dev-547-g99fa388 with our portcls only once, but after twice reboot appeared the same problem and the system couldn't boot into desktop.