Reinstall Windows 7 without CD

Welcome Sandra.

If you call Microsoft they will sell one for about $25.00

or


You can just borrow from a friend, all DVD are the same. The key determines if the OS is valid

If the OS came preinstalled with the computer, you have an OEM edition. You have to call the computer mfg, in that situation. You cannot borrow.

If Windows 7 came pre-installed, you probably have a recovery partition. look in the advanced boot menu to see if there is an option for the recovery partition: Advanced Boot Options

Look at the first option in step 3 (Repair your computer)

BSOD Index

The ACPI_BIOS_ERROR bug check has a value of 0x000000A5. This bug check indicates that the Advanced Configuration and Power Interface (ACPI) BIOS of the computer is not fully compliant with the ACPI specification.

Your stop error points to BIOS. you probably haven't done anything to the BIOS though. The issue could be hardware. Is the computer under warrentee or purchased at a store that can test it out for you?

More info on this error:

http://support.microsoft.com/kb/314830
When you are installing Windows XP, you may receive the following Stop error: STOP: 0x000000A5 (Parameter1, Parameter2, Parameter3, Parameter4)
The ACPI Bios in this system is not fully compliant to the specification. Please read the Readme.txt for possible workarounds, or contact your system vendor for an updated bios.

The bios in this system is not fully ACPI compliant. Please contact your system vendor 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 installation."

You should be able to get into the BIOS, BIOS for Beginners : Introduction
If you are comfortable doing so. I dont know your level of computer skills so If you have tried any of these things, please let us know. If you can get into the BIOS, then check to see what hardware the system is recognizing. Make sure whatever you see in BIOS matches your specifications for your computer.

sandrav said:

Hello there, thanks for the quick replies.

I got it preinstalled so I'm going to try the recovery partition now and otherwise I have to contact Asus right?

correct, there might be a few things we can try to sort it out, but if you are getting a BSOD on startup and cant get into windows, then the options are limited a little.

If the recovery partition doesn't do it, then I would advise getting Asus on phone as support. The stop error is usually seen in installs, Asus support might have seen this issue already. The more people looking at it, the easier your re-install or fix (if possible) will be.

If your able to get to the advanced boot options, try the Safe Mode option and see if it starts up.

Edit: sorry for possible confusion. look at Theog's post, is the Hard drive recognized in the BIOS. Also, the advanced boot options are outside of BIOS.