Thanks for your time. The main reason I thought a repair was in order was becuase I was getting several error messages that included errors like, "windows is unable to verify the license number on this machine," thus preventing me from logging on to my account and starting windows. I use Motzilla, but on the occasions that I have to use IE, it will sometimes work, but other times I get errors and it shuts down. My task manager will sometimes have a "rundll" value in it, and according to my research if the value is consistently there it could mean a virus, but if it occasionally pops up then, "they tend to appear only when you are already having problems of some sort with your PC, or a particular DLL is either misbehaving, is buggy, or is having problems, such as a Control Panel applet hanging for example." (from www.answersthatwork, list of task manager programs). So i thought that simply a repair might fix the bugs.
As for the specs on my comp, its a dell (yuck) 4600c 2.6 GHz, 512MB DDR SDRAM at 400 MHz, 80gb 7200 RPM Ultra ATA Hard Drive, NVidia GeForce FX 5200 Graphics Card, Intel Pro 100M Intecrated PCI NIC Card, just basic DvD/CD Combination Drive. I'm not sure what else you need, i'm not sure what "mobo" refers to. Just let me know and I'll get it for you.
Thanks again for your time, i do appreciate it.