I am updating an Inspiron 15  5558 with the lastest drivers manually using the Service Code and Express Service Tag.  I am not using the Dell  Update utility.   I have found several of the drivers /updates on the Dell site have either the same or an earlier version number than my laptop, but  the Dell release date may be more recent with some files. Also, some files on the Dell site are the same version with an A00 suffix.  The BIOS file seem to be consistent.   What is the latest file   - file version or release date?