Boardview in FZ format for a desktop motherboard identified as A58-C, revision 1.00 according to the file name. The naming follows the style ASUS uses for its desktop boards, though no brand is stated in the name itself. An FZ boardview shows the part placement, net names and pin connections of both PCB sides, so you can follow a rail from a VRM phase to the socket or find which component sits on a shorted net. Open it with a viewer that supports FZ, such as OpenBoardView or FlexBV, and check that the revision silkscreened on the board reads 1.00.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @boardview. Enginerys does not host this file.
How to open a .fz file
Compressed and encrypted boardview used for ASUS, ASRock and Pegatron boards.