title: can't uninstall packages
body: <p>Hi I uninstalled a package but it still look accessible, can somebody help please? Thank u!</p>
  
  <pre><code>&gt; remove.packages("RODBC")
  Removing package from ‘E:/R/R-3.3.3/library’
  (as ‘lib’ is unspecified)
  
  &gt; library(RODBC)
  # no error. it's still there
  
  &gt; attr(sessionInfo()$otherPkgs$RODBC, "file")
  [1] "E:/R/R-3.3.3/library/RODBC/Meta/package.rds"
  # it really is there...
  
  
  &gt; remove.packages("dplyr")
  Removing package from ‘E:/R/R-3.3.3/library’
  (as ‘lib’ is unspecified)
  &gt; library(dplyr)
  Error in library(dplyr) : there is no package called ‘dplyr’
  # this guy is removed
  
  
  &gt; .Library
  [1] "E:/R/R-3.3.3/library"
  
  &gt; .libPaths()
  [1] "E:/R/R-3.3.3/library"
  </code></pre>
  
  <p>Would it be possible that the package <code>RODBC</code> was in use so that can not be removed? </p>