Two things to try.
You may find you have Adobe reader in MSconfig under the start Tab. First untick that and reboot and try again to remove the files.
But, I believe these files may be associated with Adobe Flash. You may find, if you uninstall Flash, in Programs and features, the files may then be removed. But before doing this, move those three files back where they belong.(You will be prompted to reinstall Flash again if needed in the future, which you can safely do)
Reinstall Adobe reader, with any extras, and try the standard uninstall again. Again, move those three files back where they belong first.