A problem has been detected and windows has been shut down to prevent damage to your computer. IF this is the first time you've seen this stop error screen , restat your computer . IF this screen appears again , follw these steps: The BIOS in this system is not fully ACPI compliant. Please contact your system vendor or visit for an upated BIOS . IF you are unable to abtain an updated BIOS or the latest BIOS supplied by your vendor is not ACPI compliant , you can turn off ACPI mode during text mode setup . To do this , simply press the F7 key when you are prompted to install storage drivers . The system will not notify you that the F7 key was pressed - it will silently disable ACPI and allow you to continue your installation. Technical information: *** STOP :0x000000A5 (0X00000002,0X81276760,0XE105D608,0X8I276C68)
It means your computer has a hardware issue, post computer specs since no one here besides you know about it.