Use Anvir or Winpatrol (search click here for download)
and just disable startup for now.
He won't be short of disc space just yet. Not all bloatware is useless. If he tries it and doesn't like it and has alternative Audio software then it can be uninstalled.
When system is clean and setup as he likes it,
make a system image and keep it as MyFactoryRecovery or something. Saves hours on a reinstall.