affected: ros trunk r75546 gcc dbg build
affected: ros 0.4.6RC1 gcc dbg build
reproducible for me in VBox 4.3.40 without any additions.
AC97 driver is not needed to see this.
-open explorer file browser
-navigate to and double-click C:\reactOS\system32\drivers\cmicontrol.exe
-an error-box will popup "ERROR_NO_MORE_ITEMS..." click 'ok'
-another error-box will popup "ERROR_SUCCESS"
-You can't click 'ok' on the second box because the system already broke into debugger