Desktops & All-In-Ones

[POB]

My Acer desktop has been increasingly erratic for several months. Shuts down by itself for no reason - front panel USB ports and card reader don't function etc. So I did a  "Restore Operating System and Retain User Data". After that finished the system and reboots and I get the following message "Windows cannot complete installation on this computer".  Since I didn't get any system discs with this computer what can I do? It does this in Safe and any other mode. I'm told by Acer support that I no longer have warranty telesupport. Is it time to throw this thing out? What does anyone suggest?

[HK53T]

you do not say what desktop you have

it might need to be reloaded totally instaed of try save user data