symband,
Your friend is basically correct. You need to install the drivers for your new motherboard before windows will work properly. As Arrow stated, sometimes it's easier to just
backup all your data, reformat your hard drive, and start with a nice clean install of your chosen OS.
You can however leave your system the way it is, install your mobo, and then install the new drivers for it. Usually though, you end up with many device conflicts afterward.
The easiest way around this is to delete any and all devices with multiple listings in the device manager.
This can be tricky to the novice, but then again so can doing it all from scratch after a reformat. Do your homework first, and download all the latest drivers for every piece of your hardware. Backup all your data. Then, get your buddies with experience to help guide you through it.
Otherwise this can be a frustrating learning experience. Trust me, I learned the hard way.
"This was no boating accident"