When I try to go into my Windows Live Mail, a box comes on that says" Do you want to allow the following program to make changes to this computer " if I don't click on 'YES'  I  can't get into my e-mail account. Also all my contacts are gone, I can't even add them back in. I don't understand what happened, my e-mails were working just fine before Microsoft did a upgrade.

The problem is it some how changes the settings on my router which connects our PCs to  the modem. What  Ireally want is to go back to msnmessnger10.  which it will not let me do even after I uninstall it.

my hotmail keeps saying sorry seems to be a problem right now

Here is the problem code:

Reporting-MTA: dns;snt0-omc1-s21.snt0.hotmail.com
Received-From-MTA: dns;SNT122-W41
Arrival-Date: Tue, 19 Jun 2012 14:29:34 -0700

Final-Recipient: (removed by moderator)
Action: failed
Status: 5.7.1
Diagnostic-Code: smtp;554 5.7.1 <(removed by moderator)>: Relay access denied

Final-Recipient: (removed by moderator)
Action: failed
Status: 5.7.1
Diagnostic-Code: smtp;554 5.7.1 <(removed by moderator)>: Relay access denied

Every time I send a calendar invite from my @live.com account I get the error below.
 
Windows Live Calendar Error "There's a problem sending invitations and responses to invitations right now. The event was saved to your calendar but you'll need to refresh your browser to see it. Try sending your invitation or response again later."
 
I have cleared the cache, changed passwords, and etc.  I have another account with an @live.com and it has no problems sending calendar from the same computer.  I have placed both account side by side and have gone that all the settings and cannot find anything different.  I even created a thrird new account just to test and it also has the calendar invitation error.  So why can one account work fine and the other do not.  Any help would be very appreciated.
 
Thanks 
I cannot add my friend. 
He can add me and message me, but I cannot message back or add back.
When I click "add to contact list" MSN tells me we are already connected.

But we are not.
When I search him as a contact to add manually MSN tells me "he does not use live messenger" which he clearly does.
We both cannot figure out the problem.
Other contacts can not see me and I can not see the other contacts in messenger, what can i do to overcome this problem?
Other contacts can not see me and I can not see the other contacts in messenger, what can i do to overcome this problem?
For some reason in the last two weeks I have had to rebuild my identity 3 times. Which causes all my messaged and contacts to be lost. Is there a problem that needs repair or updated.