I can suggest four options for you:
1) You could try some other rescue disk. Many factors contribute for a failed boot and trying other ones may work. Check this
link if you want to follow this option.
2) You could also try to repair windows using its setup CD. Following this procedure will save you from installing all your programs again. Also your files should be safe but can't be sure as it depends on the type of virus(es) your PC is infected with. But be sure to install an anti virus software, update it and run a complete system scan as soon as you boot into Windows after install (before running any other programs). Check out this
link (or this
link) for details.
3) Make a completely new install of Windows without formatting your hard drive preferably on a different partition. This way your files should be there but all your favorite and required programs have to installed again. Scan after installation will be required to clean your PC. You have to manually delete the old Windows files. Choose this option if you can't repair but want your files.
4) Completely format your PC and make a fresh install. All your files and programs with settings will be lost. All virus infection will be removed too. This
link might be helpful here.