Always wanted to be sure....

I always wanted to be sure if it is safe to remove this invalid registry entries found with jv16 PowerTools Reg cleaner. Sorry for being a huge list, but better safe than sorry. What do you think - are they safe to delete or not?

Error Message - Useless File Extension:
-----------------------------------------------------
HKEY_CLASSES_ROOT\.ac3\
HKEY_CLASSES_ROOT\.avs\
HKEY_CLASSES_ROOT\.bup\
HKEY_CLASSES_ROOT\.cal\
HKEY_CLASSES_ROOT\.cals\
HKEY_CLASSES_ROOT\.cmp\
HKEY_CLASSES_ROOT\.CUT\
HKEY_CLASSES_ROOT\.dbl\
HKEY_CLASSES_ROOT\.DDS\
HKEY_CLASSES_ROOT\.dos\
HKEY_CLASSES_ROOT\.dos\
HKEY_CLASSES_ROOT\.dwd\
HKEY_CLASSES_ROOT\.emulecollection\
HKEY_CLASSES_ROOT\.ica\
HKEY_CLASSES_ROOT\.JNG\
HKEY_CLASSES_ROOT\.KOA\
HKEY_CLASSES_ROOT\.ljp\
HKEY_CLASSES_ROOT\.m2p\
HKEY_CLASSES_ROOT\.m2t\
HKEY_CLASSES_ROOT\.m2ts\
HKEY_CLASSES_ROOT\.mmv\
HKEY_CLASSES_ROOT\.MNG\
HKEY_CLASSES_ROOT\.nct\
HKEY_CLASSES_ROOT\.nls\
HKEY_CLASSES_ROOT\.nls\
HKEY_CLASSES_ROOT\.NSV\
HKEY_CLASSES_ROOT\.pcm\
HKEY_CLASSES_ROOT\.smp\
HKEY_CLASSES_ROOT\.svx\
HKEY_CLASSES_ROOT\.trp\
HKEY_CLASSES_ROOT\.Tub\
HKEY_CLASSES_ROOT\.vox\
HKEY_CLASSES_ROOT\.wfx\
HKEY_CLASSES_ROOT\DMCConvert\
HKEY_CLASSES_ROOT\DVDFabPlatinum\
HKEY_CLASSES_ROOT\DVDFabPlatinum\
HKEY_CLASSES_ROOT\NBBACKUPType\
HKEY_CLASSES_ROOT\NBCOMPRESSType\
HKEY_CLASSES_ROOT\NBJOBType\
HKEY_CLASSES_ROOT\PCBFile\
HKEY_CLASSES_ROOT\PCBFile\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.001\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.bak\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.BUP\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.cal\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.cmp\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.DA0\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.ghst\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.part\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.pf\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.rls\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.sd\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.sfv\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.sn1\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xbin\
HKEY_LOCAL_MACHINE\Software\classes\.ac3\
HKEY_LOCAL_MACHINE\Software\classes\.avs\
HKEY_LOCAL_MACHINE\Software\classes\.bup\
HKEY_LOCAL_MACHINE\Software\classes\.cal\
HKEY_LOCAL_MACHINE\Software\classes\.cals\
HKEY_LOCAL_MACHINE\Software\classes\.cmp\
HKEY_LOCAL_MACHINE\Software\classes\.CUT\
HKEY_LOCAL_MACHINE\Software\classes\.dbl\
HKEY_LOCAL_MACHINE\Software\classes\.DDS\
HKEY_LOCAL_MACHINE\Software\classes\.dos\
HKEY_LOCAL_MACHINE\Software\classes\.dwd\
HKEY_LOCAL_MACHINE\Software\classes\.emulecollection\
HKEY_LOCAL_MACHINE\Software\classes\.ica\
HKEY_LOCAL_MACHINE\Software\classes\.JNG\
HKEY_LOCAL_MACHINE\Software\classes\.KOA\
HKEY_LOCAL_MACHINE\Software\classes\.ljp\
HKEY_LOCAL_MACHINE\Software\classes\.m2p\
HKEY_LOCAL_MACHINE\Software\classes\.m2t\
HKEY_LOCAL_MACHINE\Software\classes\.m2ts\
HKEY_LOCAL_MACHINE\Software\classes\.mmv\
HKEY_LOCAL_MACHINE\Software\classes\.MNG\
HKEY_LOCAL_MACHINE\Software\classes\.nct\
HKEY_LOCAL_MACHINE\Software\classes\.nls\
HKEY_LOCAL_MACHINE\Software\classes\.NSV\
HKEY_LOCAL_MACHINE\Software\classes\.pcm\
HKEY_LOCAL_MACHINE\Software\classes\.smp\
HKEY_LOCAL_MACHINE\Software\classes\.svx\
HKEY_LOCAL_MACHINE\Software\classes\.trp\
HKEY_LOCAL_MACHINE\Software\classes\.Tub\
HKEY_LOCAL_MACHINE\Software\classes\.vox\
HKEY_LOCAL_MACHINE\Software\classes\.wfx\
HKEY_LOCAL_MACHINE\Software\classes\DMCConvert\
HKEY_LOCAL_MACHINE\Software\classes\DVDFabPlatinum\
HKEY_LOCAL_MACHINE\Software\classes\NBBACKUPType\
HKEY_LOCAL_MACHINE\Software\classes\NBCOMPRESSType\
HKEY_LOCAL_MACHINE\Software\classes\NBJOBType\
HKEY_LOCAL_MACHINE\Software\classes\PCBFile\
-----------------------------------------------
There seems to be duplicates in different areas as you can see though. If you are familiar with these file extensions and\or registry keys, maybe you can highlight or leave out the ones I can delete if any.

Thanks
dja2k

 

I always say 'delete safe ones' i.e. Green, and no problems after using it over a year.

Ian