This is not quite the same problem that tigerbill88 has been experiencing, but it may be related.
I am using also using Windows 10 64 bit
I have been using CCleaner (Free), successfully, on all my PCs for hundreds of years (well, at least 20 anyway!)
I have never had any issues until the last 2 (failed) attempts to install the last 2 updates.
No error message - the install process just stops after I click the Install button on the (usually) final install dialogue box.
I ignored it the first time and continued to use the outdated version, as I didn't have the time to d