Sometimes $$DeleteMe.MpEngine.dll.01c85bda477479b1.0012 and other 0012 system errors can be related to problems in the Windows registry. Several programs can share the same $$DeleteMe.MpEngine.dll.01c85bda477479b1.0012 file, but when these programs are uninstalled or changed, sometimes "orphaned" (invalid) 0012 registry entries are left behind.