They have a different motherboard they can install, it'll involve clearing the c: drive and reinstalling windows to make sure it all works (smells like bullshit to me) and it won't be ready until tomorrow.
The ACTUAL replacement motherboard will be arriving tomorrow and the machine will be ready to pick up tomorrow.
By now the more astute amongst you will have noticed that these "options" make not a damned bit of difference to the time at which I get my computer back. What in the hell is the point of even MENTIONING the other motherboard if it involves no difference in when I get it but involves wiping my hard disk? What the fuck is wrong with these people?