Skype taking long time to activate – sign up takes even more

Hello,
The skype on my pc is taking more time to start up and the sign up process is even more time costing and durign this process no other application runs or to be specific the pc gets considerably slow.
So far I have used it for a while and it was not this bad. Kindly someone tell me what is causing the trouble and also the way to solve it.
Johan Weiz
