Fallout 3 causing network access problems

well you see after buying Fallout 3 game of the year i found out i had to make some upgrades to my comp and dual boot and windows vista so i would have windows 7 and windows vista so my father untill he got home from a work trip allowed me to install it on his comp but this is where it gets weird after playing all week beating the main storyline and all the dlc's except for broken steel i uninstalled fallout 3 and deleted the folder off my dads comp later the next day there was a power surge and my internet went down for 2 days i figured it's gonna come back on eventually so i asked my father and he discovered we both couldn't connect to our home network so my father went exploring in the events manager and discovered that fallout 3 was the cuase of the whole problem. Has anyone else encountered this problem and succesfully fixed the problem?
:note problem was fixed as soon as fallout 3 was the cuase of the problem (my dad works quick) i just want to prevent it from happening again