i was given the task to upgrade my cousins pc.......i put in a new MB and cpu....got everything running.......blah blah blah. long story short is that when ever the pci modem is installed, the computer will not shut down. start>shutdown, goes through the process of shutting down then right at the last min its like its about to shut down, but it just reboots. it keeps doing this every time i try. put once i take out the modem, everything is fine and it works ok. any ideas?