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 restart your computer.If this screep appears again,follow these steps, The BIOS in this system is notfully ACPI compliant.please contact your system vendor or visit http://www.hardware-update.com for an updated BIOS.If you are unable to obtain 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 install ation. Technical information: ***STOP:0X000000A5(0X00000011,0X00000006,0X00000000,0X00000000)