After installing a fresh copy of ReactOS, I install the latest stable version of 7-zip off of a cdrom containing two files, a copy of the 7-zip installer and a copy of the sysinternals suite from Microsoft, as I was wanting to see which of those utilities would work on ReactOS. I was using the 7-zip file manager to browse to the cdrom as 7-zip did not create a filetype association for itself to open up zip archives. Browsing the C: drive works okay with 7-zip file manager but the moment I go to open the CDROM I get a bugcheck 0x1e. The iso was created using mkisofs on Linux. Debug log follows.