iTunes Match hangs at step 2 and does not complete I have been trying to get iTunes Match to work for a week. It keeps getting stuck at Step 2.  To try and fix it I have been stopping and starting Match, sometimes it gets further and other times it doesn't get as far.

Today I have another problem, when I start iTunes Match it gives this error

"We could not complete your iTunes Store request. An unknown error has occurred (4002)."

Now I can't start iTunes Match all.  Have to say I am very disappointed with how difficult it is to make this service work.

-- Edit --

I left iTunes Match running overnight. This morning iTunes had "quit unexpectedly".  Now it is starting all over again (sigh).
Open iTunes. Click the “Store" Menu Drop Down. 
While holding down Option click "Turn Off iTunes Match”
Reboot your machine. 
Open iTunes. Without holding option, click the “Store” Menu Drop down again > "Turn on iTunes Match”


It should now run as expected.