Re: Aspire XC-780 Desktop Computer DRIVER FOR WINDOWS 7
you need to manually search them on the web
Open Device Manager by clicking the Start button, clicking Control Panel, clicking System and Security, and then, under System, clicking Device Manager. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
Where you see the Yellow exclamation mark, double click it, choose "Details" tab, from the dropdown menu choose "HardwareIDs", click the first string and copy/paste it here.
If i was helpful, a KUDOS is appreciate and remember to mark "Accept as Solution", the post that solved your problem. I'm not an Acer employee, i'm unemployed.