Can't boot computer I get a warnig mssage unofficial case opened

When you need to recover part or all of the files on your Acer Veriton M460 desktop computer, Acer makes it easy to do by offering a built-in recovery program called eRecovery Management.
This option uses clean operating system files, usually stored on a separate partition of your hard drive, to correct errors or return the system to its original factory settings.
You can also use this program to write separate hard copies of the eRecovery program onto CDs or DVDs in case of hard drive failure.
Create Backup Disks
If your M460 did not come with separate recovery disks, and many machines don't in recent years, you can create your own through "Acer's eRecovery Management" program located under the "Start" menu.
Click on "Backup," select "Create Factory Default Disk" and follow the on-screen directions.
The program will inform you of the number of CDs or DVDs you need and help you through their creation.
Recovery with Disks
To use your created disks for recovery, place the first disk in the optical drive and reboot the system. As it boots, hold the "ALT" key and tap "F10" repeatedly until the computer boots and you see a screen titled "Starting Acer eRecovery."
You will see three options for recovery: to factory default, from user backup or from CD/DVD. Choose the option you desire and follow the on-screen directions to initiate the recovery sequence.
Recovery from the Hard Drive

Since Acer places the eRecovery Management program directly onto the computer, you can run the recovery option while in your desktop.
Open the "Acer eRecovery Management" program under the "Start" menu and click "Restore." You can choose to restore the computer to factory defaults and lose all the personal data stored on the hard drive or only restore the operating system and leave your data intact.
Select "Yes" on the confirmation screen and then "OK" to start the program.
Recovery Vs. Restore
When performing computer problem solving, the term "recovery" is often used interchangeably with the word "restore."
In some cases, "recovery" can mean to simply correct problems, such as replacing corrupted operating system files with good ones.
The term can also refer to "recovering" the system to its fresh-from-the-factory state, which is what "restore" means as well.
Restore Drivers or Applications

Acer's eRecovery Management program also offers the option to reinstall drivers or applications, which could become corrupted or damaged over time.
This option allows you to replace the current drivers for your Windows operating system with the ones originally installed on your system.
Under the "Restore" tab of the "Acer eRecovery Management" program, click "Reinstall Drivers or Applications" to see the content list and select the files you'd like to recover.
http://supportforacer.iyogi.com/veriton/factory-settings-6.html
http://support.acer.com/acerpanam/desktop/0000/Acer/AspireE360/AspireE360faq40.shtml
http://support.acer.com/product/default.aspx?modelId=477

Undo the screws at the back of the case then slide the side off front to back direction. Then once inside locate the hard drive and unplug the power cable then the sata cable. Their may be screws holding the hard drive in place also so undo them and slide the drive out. Then slide the new drive in and screw and attach cables. Remember where they go by looking at the old one if your not familier with computer hardware. Hope this helps.

Hello,

I have an Acer L410 that is having the same issues. I get the power light but it will not boot. I hear that the hard drive is spinning so this is something that is good as well. Also I placed the hard drive into another Acer computer and it started up the other pc just fine. So thie is what fixed this issue. " I went out and bought a battery to replace the one on the motherboard it is a CR2032 3volt round battery that I got at Walgreens for 5 bucks. I hope this helps you out and I hope it saves others from spending too much to correct this issue. If you could please visit my channel on youtube to give thanks for my assistance, its under Kenzilla73 "

First, open your computer case by removing the two screws on the back and removing the side panel. Second, plug the blank harddrive into your motherboard using a SATA cable and attach the harddrive to the power supply.Third, run a cloning program such as Achronis True Image (http://www.acronis.com/homecomputing/products/trueimage/index.html).

Most desktops have fans fitted, especially in the power supply.
The bearings and not that good and become noisy when older. They are replaceable but a replacement power supply is far less effort.
Show the fans a plastic pipe from a vacyym cleaner from time to time, that will make the fans more efficient and reduce the wear and noise.
The hard drive can get noisy also, (if it is I would before it is too late), recommend replacing it.
Hope that helps.

update bios if this didnt work, reseat hard drive

Hi friend,

You need to open the CPU both side then you need free hard drive by data cable and nut..then it will free ..you can use any computer..

With regards

The acer veriton m460 has three faulty capacitors. Check and see if you have bulgy capacitors. I have ten of these computers and all have three blown capacitors.

Follow the link for driver downloads
http://www.acerpanam.com/synapse/forms/portal20.cfm?website=AcerPanAm.com&siteid=7117&areaid=2&formid=3394#results
Mark
ps. thanks for the rating

According to Acer you will need an EIDE Hard Drive. Originally that model came with a 20 GB Hard drive. Should be relatively inexpensive if you can find one.

Here is a link for a manual on your system you can download: http://www.acerpanam.com/synapse/data/7117/documents/v7200ug.pdf