[Can't update 550 pro]

Thanks a lot, it's updated and running no problem

[Can't update 550 pro]

Everytime I try to update to 550 I get an error telling me Error opening file for writing: C:\Program Files\CCleaner\CCleaner64.exe, then if I ignore I get the same message but with branding.dll.

I've quit my Malwarebytes and halted my Avast, I'm not sure what to do next.

Need help please