title: Cannot install any R packages, unable to translate to native coding
body: <p>Whenever I open Rstudio I get this message in red:</p>
  <pre><code>Error in gzfile(file, mode) : cannot open the connection
  In addition: Warning messages:
  1: In list.files(cacheDir) :
  unable to translate 'C:/Users/&lt;U+03A7&gt;a&lt;U+03C1&gt;&lt;U+03B7&gt;&lt;U+03C2&gt;/AppData/Local/RStudio/explorer-cache' to native encoding
  2: In gzfile(file, mode) :
  cannot open compressed file 'C:\Users\×áñçò\AppData\Local\Temp\RtmpEZExey\rstudio-available-packages-23783cacb6/time.rds', probable reason 'No such file or directory'.
  </code></pre>
  <p>My PC user name is written in a foreign language, but as you can see from the above text, Rstudio writes it as &quot;×áñçò&quot; wrongfully.</p>
  <p>Whenever I try to install a package, Rstudio doesn't respond at all, and when I try to close it I get the message &quot;Retrieving package installation context...&quot; and I am stuck there for a while until I get this error in the console:</p>
  <pre><code>WARNING: Rtools is required to build R packages but is not currently installed. Please download and install the appropriate version of Rtools before proceeding:
  
  https://cran.rstudio.com/bin/windows/Rtools/
  Warning in install.packages :
  cannot create dir 'C:\Users\×áñçò\AppData\Local\Temp\Rtmpw9xEQw\downloaded_packages', reason 'No such file or directory'
  Error in install.packages : unable to create temporary directory ‘C:\Users\×áñçò\AppData\Local\Temp\Rtmpw9xEQw\downloaded_packages’
  </code></pre>
  <p><a href="https://i.stack.imgur.com/vNv3e.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vNv3e.jpg" alt="enter image description here" /></a></p>
  <p>I have tried everything, from reinstalling, from running Rstudio as an administration but none of these work! Could you please help me?</p>
  <p>Thank you.</p>