If using Internet Explorer with Creo and encountering such issues, try
setting it to 61.
Internet Explorer has a bug in its HTTP keepalive handling that can
impact Creo. The workaround is to set this timeout to 61. This
workaround has the side effect of keeping HTTP keepalive connections
around much longer than one really should for optimal performance and
scalability -- else we would change this setting out-of-the-box.
--
Jess Holle