when I try to update my apps a little box comes up I get asked to for my Apple ID password. However I have changed my ID but it refuses to recognise my new ID even though my new ID is recognised everywhere else. So I am unable to update any apps. Can an

All app are tied to the Apple ID used during purchase. Apple ID cannot be merged or transfered.

To update, you need the original Apple ID and password.

(Note: You can change the info associated with the Apple ID but not the ID itself. Well, you can and it is thissituation you're in).

Try to retrieve old Apple ID

https://iforgot.apple.com

I, too, have as my Apple ID, alanandirene@primehome.com - had it for nearly a year now - but if I try "Enter Apple ID and Password, it always goes to alanandirene@cytanet.com.cy - in spite of the fact that I haven't got cytanet.com.cy as my provider any more. I have successfully now had alanandirene@primehome.com, and even had my password, so why do I always get @cytanet.com.cy?

Because content bought using one Apple ID cannot be merged or transferred to another Apple ID.

So do I have to save everything in my new computer, and then completely erase all contect an setting, or reset network settings then start again? If so, it's an antiquated way to do a simple job!

For any digital devices, camera, computer, iPhone, iPad, etc.... If any content that is valuable to you it is always recommended to do backups.

I have backuped already. Frankly, if Apple cannot have my iPad onto a new computer, and a new provider if necessary, I might as well, next time, buy an android instead - after all, they have just as many apps now. I don't WANT to, though, all I ask is that my new provider is the same everywhere, and not one that is at least three years old!

iPhone is designed to sync with one computer only.

Read here:

Syncing to a "New" Computer or replacing a "crashed" Hard Drive