I am working on an Acer AM5641-E5620A. Something has happened to this computer and the hard drive has been wiped out. I need to reinsall Windows but cannot. I believe it is related to a RAID system used on this computer. I don't have the original Recovery disks and cannot make them using this computer since I can't start it.

SOURCE: Need Drivers

Here's the URL for downloading Acer drivers. The audio drivers for XP are down near the bottom. Probably the first Realtek one will be what you want.

http://www.acerpanam.com/synapse/forms/AcerDrivers/Aspire%20T160.pdf?CFID=942322&CFTOKEN=64999962

SOURCE: Having problem installing Windows XP on My Acer Aspire T650 Computer

Before you did the install did you make sure that you set your CMOS setting to check for a cd disk first before booting straight to the hard drive? When you do an install, you must make sure that the computer knows to look for a bootable disk otherwise it will look for an operating system to boot to first. If this is the problem, after you have installed your operating system you must go back and reset your CMOS settings to look for a hard drive or operating system. Hope this help and if it doesn't let me know for further assistance.

SOURCE: I need a recovery disk

You can use a hard drive imaging program such as Norton Ghost to create a recovery DVD(s). Norton Ghost is available as part of System Works or as a stand alone program. Power Quest's Drive Image is also an alternative, however it is too old to be compatible with Vista - you could do a Drive Image outside of Windows - booting off the Floppy.

SOURCE: how can do i clear my hard drive and reinstall windows

You can launch Acer eRecovery Management in a number of ways:
• By pressing the hotkey <Alt> + <F10> during the boot-up process, or at any
time when you are running Microsoft® Windows®.
This will open the Acer eRecovery Management main page.
Password
Acer eRecovery Management requires a password to activate. The default
password is six zeros (0s).
Note: If an incorrect password is entered three times, Acer
eRecovery Management closes and returns to Windows®
automatically.
System recovery
Step 1: Click on “Recovery actions”.
Step 2: You are presented with a list of available options
CHOOSE-->Recover system from CD/DVD backup
If you choose to restore from an image on an optical disk, the BIOS will be
changed to boot from the optical drive. If no backup disk is found, you are
prompted to insert the disk.
Reinstall
IF THOSE DISKS DONT WORK , YOU CAN ALWAYS RESTORE TO FACTORY SPEC FROM THE HIDDEN PARTITION ON YOUR HARDDRIVE.
Hope this helps you out .. Regards

SOURCE: Replacement harddrive into acer pc

No matter what you do, you need to partiton and format the drive and install an OS, be it with the Acer recovery disks or with an original XP install disk. You will need to boot from your CD drive to install the OS, if your drive is not bootable you will need to boot from a floppy and load drivers for the CD drive. For information on how to get these boot floppies check out this Microsoft link:
http://support.microsoft.com/kb/310994