iCloud and Quicktime install fails

Uninstall iTunes and Quick Time in order as per below.

Control Panel > Programs and Features:
Uninstall the following in order as shown:

iTunes
Quick Time
Apple Software Update
Apple Mobile Device Support
Bonjour
Apple Application Support

Restart the computer.

Remove the folder:

C:\Users\jdhurst\AppData\Roaming\Apple Computer\iTunes

Now install the latest version of iTunes and QuickTime and try iCloud again.

As both errors are also common with corrupted downloads it might also be worth trying to download the installers a second time.

The 2nd error indicates that the file isn't in the cab file, which means you likely obtained an incomplete or corrupted download.  You should download it again as @MASQ suggested.

* None of iTunes, Quick Time, Apple Software Update, Apple Mobile Device Support, Bonjour, Apple Application Support are installed.
* The folder C:\Users\<myuser>\AppData\Roaming\Apple Computer doesn't exist (I've displayed hidden files)
* I have run Windows Update. The build is Version 1709 (OS Build 16299.19).
* I downloaded the install files several times and always get the same install error
* The iCloud and Quicktime install failures happened before the Windows 10 update and before AVG install. Windows updates have been applied and AVG installed and still iCloud and Quicktime fail.

Windows updates have been applied and before AVG installed.

Can you install iCloud and Quicktime?

Download latest offline iTunes installer at the link below and try again.

https://secure-appldnld.apple.com/itunes12/091-30751-20171030-2E96FF02-B9B4-11E7-81C5-9CE3DF1CD815/iTunes64Setup.exe

I have removed AVG and rebooted the PC. Both iCloud and Quicktime now install successfully.
Thanks