J_E_R_T you may be too far from the CO or have some interference on your line i would call your ISP and have them run a line test.
also what modem do you have.
you can not reparation a drive in disk management. only add a new one from a new drive.
have you tried the windows compatibility setting for partition magic
i just love how people dont look through the computer and realize that something is unplugged. And how bestbuy can say its a power supply is beyond me, if the computer turns on the power supply is good.
OMG these places all suck except the one that got it right and did not charge for it. This is why i tell people to never take there computer to any computer repair store.