What are the specs for the computer where wyUpdate is working fast? That is, what are the differences between the fast and the slow computer? Also, what operating systems (fast & slow)?
3. what is outgoing site that i should check it's clock or not. but i know that our update server is not block because it found update after about 1 Min.
Make sure the following sites are unblocked (and fast):
If any of these sites is the slow point, then host the wyUpdate self-updates on your own site