title: run R as administrator
body: <p>I was using my own laptop to install R and I found that it only has one library. Evne though this library is still <code>read only</code>, everytime when I use Rstudio: <code>install.packages("abc")</code>, I can see that the new packages are stored automatically into that <code>read only</code> library folder.</p>
  
  <p>In my office's desktop, I "believe" I also have administrator role, as I can install and remove anything (by far). I download the latest version of R and I right click the <code>R-3.4.1-win.exe</code>, there is an item "run as administrator", then it is installed in my desktop. However, when I use R studio to install new packages as in my laptop, it always automatically create a personal folder to store the new packages. I don't know why. Is that a way to only have one folder for library? I also tried on the desktop in the plain R mode (without using Rstudio). When I want to install new packages, it always says </p>
  
  <pre><code>Warning in install.packages("devtools") :
    'lib = "C:/Program Files/R/R-3.4.1/library"' is not writable
  </code></pre>
  
  <p>And there is a window pops up to ask me "would you like to create a personal folder?" And if I say no, then</p>
  
  <pre><code>Error in install.packages("devtools") : unable to install packages.
  </code></pre>
  
  <p>Is there a ways to solve this problem? To just maintain one folder for library</p>