I had replaced a Hard Drive and installed a fresh copy of Windows 10 on our HP Notebook.
I then tried to install Itunes and got the -45075 error. I tried uninstalling, reinstalling, and all the weird tips.
I spent around 3 hours on the phone to Apple support, and it seems as if the reason for the error was AVG anti virus,which was somehow blocking additional components required by Itunes, from being installed properly.
I uninstalled the antivirus program, and re-installed Itunes... and it now works.
I am not sure if the following steps made any difference
But as part of the troubleshooting, I forced Windows to download all the latest updates which took about an hour to complete
Uninstalled Itunes and AVG
When re-installing Itunes, it was quite noticeably installing extra components.
After installing ITunes successfully, I re-installed the Ant-Virus...
Hope this helps someone else