Computers/software running slower for a limited time is quite a common thing on any network, for instance for the reason you mentioned. The worrying should start with the machine you work on not getting any faster while all the others do <img src="/ubbthreads/images/graemlins/banghead.gif" alt="" />

That happens too, you know <img src="/ubbthreads/images/graemlins/grin.gif" alt="" />