Probably a problem with the UpperFilters and LowerFilters values in the registry. There is a little explanation here
The registry values probably got messed up when you uninstalled Easy CD, and fixed when you reinstalled it.
If you just want to use Nero and don't want to use Easy CD anymore, uninstall Easy CD and then delete the UpperFilters and LowerFilters named values in the registry key:
Then reboot and all should be well again. Ahead also recommends