Registry entry causes CCleaner to crash

[TonyCzar]

I can clean all unused Registry entries using CCleaner except for one:

 

.com/acs/acs-cc?TAG_ACTION=DOWNLOAD_MAILING_LABEL&PERSON_ID=71406&DOWNLOAD=TRUE&FILE_TYPE=RTF&CURRENT_ROLE_ID=696&CURRENT_USER_ID=183740&DOCUMENT_HASHCODE=360105488&SANITY_CHECK_DOCUMENT_ID=153462&CO HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.com/acs/acs-cc?TAG_ACTION=DOWNLOAD_MAILING_LABEL&PERSON_ID=71406&DOWNLOAD=TRUE&FILE_TYPE=RTF&CURRENT_ROLE_ID=696&CURRENT_USER_ID=183740&DOCUMENT_HASHCODE=360105488&SANITY_CHECK_DOCUMENT_ID=153462&CO

 

 

Each time I try to remove this, the program crashes. When I right-click and try to see using RegEdit, there is nothing there.

 

Advice, please.