Create rpcrt4.dll.
Implement UuidCreate (using existing code from CoCreateGuid).
CoCreateGuid calls UuidCreate.

loader/loadorder.c

diff --git a/loader/loadorder.c b/loader/loadorder.c
index 5a43124..5c60b05 100644
--- a/loader/loadorder.c
+++ b/loader/loadorder.c
@@ -63,6 +63,7 @@
 	{"odbc32",			"builtin"},
 	{"opengl32",                    "builtin,native"},
 	{"shfolder",                    "builtin,native"},
+	{"rpcrt4",                      "native,builtin"},
 	{NULL,NULL},
 };