Problems downloading itunes and icloud after windows 10 install

Thanks for answering. I had already gone through bnoir's steps, including the further steps, a few times and have just tried it again in case I missed anything but it has not resolved the issue unfortunately. Only one thing is slightly different in my system is that there is not a box saying 'replace owner or subcontainers and objects' but one that says' replace all child object permission entries' which I have assumed does the same thing but still hasn't resolved the problem. I have looked on the troubleshooting issues advice page as well but cannot see anything that relates directly to solving this issue. Any other ideas please?

Yes running install as an administrator

In terms of iTunes being uninstalled, I have run Windows Install Clean Up which shows all items have been uninstalled and non are listed in the programmes. Have checked in File Explorer and all have been deleted from Program File (x86) BUT in Program Files it will not let me delete Bonjour saying 'The action cannot be implemented because the folder or file is open in another program'. I have tried going into Task Manager and it doesn't show it in Processes at all and when I look under the Services tab it has it listed as stopped, and Windows Install clean up doesn't seem to recognise it as being there so I cannot seem to delete it.

The only other iTunes file remaining on my system is the generic 'iTunes'folder which has my music library in it which I moved to my desktop.

When I try to install itunes or icloud the error message is Could not open key: UNKNOWN\Components\ long string of letters and numbers. Verify you have sufficient access to that key or contact your support personnel

One other thing I should say is that whilst following a previous forum thread to try and resolve the problem I moved iTunes.reg file to my desktop as well, could that be part of the problem?

Hi

Safe mode did enable me to delete Bonjour file successfully, thanks. However still not able to install iTunes, with same error messages coming up..

I have tried exporting and deleting the named keys but have not been able to delete them. When I export it makes a copy only to the desk top. I can delete the copy but the original file remains in Components and when I try and delete them directly (right click, delete) it comes up with the message 'Cannot delete error while deleting key'. I have also tried changing the permissions for the problem keys but it again just comes up with an error message 'registry editor could not set security in the key currently selected or some of its subkeys'

Screenshot 1 is the 1st error message when I try and install iTunes, 3 others of the same type then follow but with different key numbers

Screenshot 2 is the error message if I try and make any changes to permissions having ticked the 'replace all child object permission entries etc' box, administrator, apply

Screenshot 3 is the error message if I try and delete one of the individual key files that has the error

I tried in safe mode but same error messages appeared

Thank you very much for helping me, the problems have now been resolved having run the reset registry permissions tool a couple of times. Really appreciate your help.