I just received my new dell 4700.  It works great and is replaceing my old compaq presario.  When i try and install new video games, ie. DOOM3 and CALL OF DUTY for example, the install reads and starts installing the first disc, but if its  a multiple disc installation and install ask for disc2 to be insereted into cd-rom , nothing happens.  it took me 4 hrs to finally get DOOM3 installed.  And heaven forbid if its a 3 DISC install, it might read 1st disc, then not 2nd, or will read 1st and 2nd but not third.  These games are brand new and some i have had installed on my old comp with no problem.  I cant ebelieve its the disc because sometimes it reads the second and then not the third.  Any idea why this is happening?