this is expected behavior for all your apps, since all these applications were installed under XP, why would you expect them to work in Vista? there is no registry information telling vista how to load the programs let alone where the applications reside. if you were to boot back in to XP, your XP drive will be C: again. Then all your apps will work in XP. if you want your apps to work in vista you have 2 options 1. reinstall them on your vista Partition 2. Upgrade your XP partiton to Vista, i did this with my XP install and 98% of my apps came back working the upgrade proccess has radically been changed, if you still don't trust it though, reinstall all your apps in you Vista partition.