HELP..... InstallShield Wizard Failed on istall of FSX

I am trying to reinstall FSX. It stops when the InstallShield Wizard is publishing product information, and says setup was interrupted, exit and try to install later. I did run the event viewer and it showed FSX fialed, Source: Msilnstaller, Event ID 11708.....I tried searching for both these and couldnt find anything that helped. If anyone knows what I could try next, I have tried defraging, searching all my computer and registry for anything relating to FSX and removing from my computer . I run Ccleaner, Windows Installer Clean Up , Tried to install to a different folder, also tried copying the disk to desktop and tryed to install, same thing. Installed Microsoft updates, I am using Ultimatedefrag V 1.32My Specs,Intel P4 HT 300GHZXP Home SP21024 MB RamAbit i875P IC7(-G)HD 120 GB 7200rpmATI Radeon 9800 ProCreative AudigyLite-on combo SOHC-5236V DVD/CD-RW