HP Envy Sleekbook archive for Compal board LA-8661P. The LA-xxxxP code is Compal's motherboard numbering, so Compal is the designer of this HP board. At 357 KB the RAR most likely contains a BIOS dump rather than a full schematic. A technician writes such an image to the SPI flash with a programmer such as a CH341A after saving the original contents. Verify that the LA number on the PCB and the chip capacity both match before writing.
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 @hrtechno. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)