rare error with windoes installing newer games LOTRO

yes thats right XP
....on one computer i run lotro just fine with XP its a low spec piece but it
gets the job done for most games

however on the other machine i get error messages when trying to install the
game. it can install most of the stuff just find but some files it says are
corrupt however i can install just fine with the same files on the comp i
currently play lotro on. also when i try to use the dvd disks in the other
comp the install window shows up as blank.

this system is nforce 3 type build comp with a dvd player:

Windows XP Home Edition Service Pack 2 (build 2600)
1.80 gigahertz AMD Sempron
HP DVD Writer 530r [CD-ROM drive]
SAMSUNG SV6003H 60.05 Gig HD
1152 Megabytes Installed Memory
Board: Shuttle Inc FN85V24
NVIDIA GeForce FX 5200

and all the software and drivers are up to date as of this help request.

what the heck is going on i have installed and re-installed both drivers and
software and im about ready to tear my hair out....PLZ HELP!(i have also
tried reg cleaners).
__
SBSEED