Problem updating lightrom to 6.7

Hi,

I was running Lightroom 6.6 single license and decided to install the update to 6.7.  First I used the help/update route but it gave errors.

Then I tried to download the standalon update from the official site.  This gave an error when unzipping but I continued.  It said it could not complete the update and to my horror I was left running Lightroom V6.0  After updating to V6.5 and trying again it resulted in an error saying my software was not licensed!

I then tried another download and it gave the same error.  Yet another download gave a checksum error.

I have re installed V6 and updated to V6.5.

I tried yet another download and again the unzipping gave an error:

Winrar reports:   .....\Lightroom\payloads\AdobeLightroom6-mul-170916111844\Assets1_1.zip. The file is corrupt

Same with 7zip

Any ideas please?