My ACER Desktop supplied by our home office has first a problem that it constantly shuts down and starts up again after a while, the person I gave the computer for fixing had it reprogrammed with windows 7, after a while I could not print from any port, when I updated the version of windows it did not pass the windows security check, I now would like to go back to the original version of windows supplied with the computer, the computer came with a formatting disk and 2 windows vista disk, how could I roll back to its original format?

SOURCE: Acer aspire 3610 not booting pass flash screen and if it does gives an error openning windows

try by changing the data cable and check the jumper setting of the hard drive

SOURCE: setting up a new hard disk and operating system on an Acer Power SC

There should be more than one disk, as the other will be drivers, all you need to do is press F2 or Del to get into your pc's bios settings and change the first boot device to your cd drive, insert your acer disc into the drive, then save the bios settings, restart the pc ,then, when prompted on screen to press enter to boot from cd; do so.

You should then follow instructions to set up windows on the 'C' drive as is default and it may need to reformat in NTFS.

SOURCE: Acer eRecovery Problem

When you Formated the Dirve You Deleted The Hidden Recovery Partition

SOURCE: Acer Power FH will not boot Windows XP Pro

Well your explanation was clear but your should've not ruled out the hardware issue. if both computer suffered the same problem at the same time the problem could be within the Desktop itself. I have experienced the same problem with my HP when I move to my new house after 5 years. What happend is that during transportation the vibration lossened up the parts inside your computer. So what I did was I reseated all the parts inside the desktop and reinstalled Windows XP. Till now I have never had any problems yet.

SOURCE: Acer Aspire 5100 won't system restore

If you created your system restore CDs when you purchased the system, insert your first CD into the CD drive and boot your computer. This will restore your computer to factory settings. ALL DATA WILL BE LOST.