When i uninstalled quicktime, it was successful, but now i wont to install the latest version. when i click on install it tells me i have not uninstalled the preiovus version.
does any one know how i can fix the problem? i tryd to reinstall the same version but that didnt work either.
any would be apprecated.

Check your harddisk for any leftover directories.
Then run regedit and delete all references to quicktime.
Or rollback until before Quicktime, but you might/will lose other info that way.