Debugging Stop 0xA5 - ACPI_BIOS_ERROR
To begin this is the first time I've personally seen this bugcheck, however, Patrick (@bsodanalysis) has beeen noticing this bugchecks occur on the HP Envy 700-074 model with Windows 8/Windows 8.1. The best resource you could use with this bugcheck is downloading yourself a copy of the ACPI Specification and then reading through the relevant parts of the documentation. Operating Regions should be located on Page 33, but I will explaining those in this blog post anyhow. The most important part is the first parameter, which indicates the exact problem which has happened, this is partly due to poor ASL (ACPI Source Language) code used by the vendor, which is then complied into bytecode called AML (ACPI Machine Language). The only method to fix this problem is to search for a later version of the BIOS. We can gather some BIOS information using the !sysinfo machineid and !sysinfo smbios extensions. This information can used to the vendor which BIOS version this problem is happening wi...