Outlook 2010 problem receiving

Hi all, I am just in the process of transfering all my info to new pc from XP to Win 7.. (well now Win 10 as it's just done the update), but when i'm trying to set up Outlook 2010 (I have the full MS Office Pro 2010), I have one account that will not receive emails on any other machine except my original XP.. I've got 3 email accounts set up on the new machine and can SEND on all of them, and RECEIVE on only two.. The send and receive box shows no errors and quickly processes all the other emails, but there is the one that will NOT receive..
I have both pc's set up in front of me and copied the info from old to new very carefully... I even had the other half check and enter again herself, but still doesn't work.
I've checked my ISP webmail and can see the email waiting there, just the other machines won't fetch it..
Oh, and i did set it up on another win 7 pc and didn't work and also on another XP machine, again no luck..
What am i missing? tell me it's something daft i'm missing..
Any ideas?.. PLEASE
Thanks in advance

Have you checked the ISP's setup instructions? Is it outlook 2010 on the other successful or failed machines as well?

Yup.. ISP . Followed them to the letter.. and outlook 2010 on all machines.

Don't know, but the next thing I would do is drop the firewall to test.

OK tried without firewall then without antivirus - no joy..
I don't understand why the other 2 accounts still work on the new machine but this one just wont receive.

The faulty account is set to receive in Send/receive All? You could try sending manually just that one account.

Or you could set the account up again. I think outlook has a feature where it automatically probes and finds the best settings. Or maybe the account can be exported from the box that works?

Tried numerous times to set the account up again with no joy..
Just a thought.. i think i set up the account in question originally on the office trial that came with the pc.. and then set the other accounts up later after i had installed my office.. would this affect it?? maybe i'll uninstall it all and try from scratch..

OK as a follow up, uninstalled and reinstalled and still no joy..
Getting fed up now