Windows 10 Fall Update introduced a new Windows Defender feature called "Controlled Folder Access" to prevent ransom-wares taking control of your computer. Unfortunately, this feature seems to block some installers from copying the files to the locations required by the plugin.

A workaround is to temporary disable CFA, install the plugin and enable it again.

Please follow the steps below:

1. Open Windows Defender Security Center
2. Go to Virus & threat protection - Virus & threat protection settings
3. Scroll down to Controlled Folder Access
4. Temporarily turn off Controlled Access
5. Then try running the installer and see if it completes
6. Turn Control Access back to on