UT2004 problems

[fattyrupert]

Hi,
I just got an origional copy of unreal tournament 2004 and it won't install let alone let me back it up. It gets so far in and says it can't read from the disc. The disc is perfect and I exchanged it once already. Also I deleted Clone and Nero as I heard that may be it. Other than that it still won't even install. Wierd thing is, it never crashes in the same place twice and sometimes it won't even open the setup.exe.

Help pls