When installing the VMware client integration plugin, the installation reports the useful error

There is a problem with this Windows installer package. A program run as part of the setup did not finish  as expected. Contact your support personnel or package vendor.

It fails because the hosts.bak file already exists.

Remove  file hosts.bak in folder C:\Windows\System32\drivers\etc\

Source : https://communities.vmware.com/message/2487124