I'm assuming your browser is IE (8 or 9) since you said it's a brand new computer. Hopefully this simple maneuver will fix it.
In IE go to Tools>> Internet options>> General Tab Click the "settings" button in the Browsing history section and under the heading "Check for newer versions of stored pages
" choose "every time I visit the webpage
" or "Automatically
" (If the current setting selected was "Never" then there's your answer
) You may want to click the delete button under the same browsing history & clear the temp files...maybe delete the history cache too.
Click OK OK to close both dialog boxes.
Pages should now refresh.
Edited by Union_Thug, 02 July 2011 - 11:45 PM.