Merge pull request #349 from lmweber/gh-pages

add note that users should install R as administrator on Windows

index.html

@@ -687,6 +687,10 @@ and the administrator will contact you if we need any extra information.</h4>
         from <a href="http://cran.r-project.org/index.html">CRAN</a>.
         Also, please install the
         <a href="http://www.rstudio.com/ide/download/desktop">RStudio IDE</a>.
+        Note that if you have separate user and admin accounts, you should run the 
+        installers as administrator (right-click on .exe file and select "Run as 
+        administrator" instead of double-clicking). Otherwise problems may occur later, 
+        for example when installing R packages.
       </p>
     </div>
     <div class="col-md-4">