Two errors during DAZ4 installation

1. Windows reported that it could not encrypt folder __MACOSX ?
. . . I answered ''yes'' to whatever it meant.

2. After the installation was complete and I hit ''next'' It tried to open a wabpage :
. http://www.daz3d.com/newsletter/2010/redirects/10569__DS4_Thankyou.php
. . Internet Exporers said ''Opps not found''.

Is it safe to use. Or do I need to do uninstall do something and reinstall ?
( I never got the 2009 files to install into Daz 2009 version. ( millenium kids, vitoria and mark ( if I remember the names correctly) )