msi: Check other sources if install media not present at last used location.
[wine] / dlls / wer /
drwxr-xr-x   ..
-rw-r--r-- 95 Makefile.in
-rw-r--r-- 9228 main.c
drwxr-xr-x - tests
-rw-r--r-- 2243 wer.spec