Hi,
· Which game are you trying to run on the computer?
Xlive.dll actually comes in the 'Games for Live' package installer. Let’s download Xlive.dll from the following link and check if that helps.
http://go.microsoft.com/fwlink/?LinkId=128962
a) Download the package
b) Right click the package and choose 'Run as Administrator'
c) Install the application and restart the computer.
d) Try and run the game and check if the issue persists.