Yes, if you wipe the operating system you need to install the proper drivers for hardware.
From a different computer you will have to go to Acers website, go to the driver page for your computer and download all the drivers for your PC. Then copy them to a flash drive or CD and then install them on the Acer.
Now if it came with windows 7 or 8 and you then installed XP on it, then you are going to have to figure out every chipset and hardware and manually search for drivers for them.