Thanks for supplying your PC specs.The problem may be related to the processor. The requirements for iClone2 did state a minimum Pentium processor. iClone did have some compatibility problems with older Athlons like the XP so this may well be the cause of your problems.
All I can advise is to make sure you have all the latest graphics drivers, DirectX 9 and have run the Windows Update so your system is up to date. This may help getting iClone2 to run.