Install old version of R on Windows 10
<p>How do I install an old version of R on a window 10 64 PC.</p>

<p>I am currently running R 3.2.3 with RStudio without any problems.   However a package I want to use (GSIF) only works on R2.15.  I have found that it is possible to easily get RStudio to work with different R versions and I have found and downloaded the old version of R I want ( R-2.15.1-w.tar.gz) from the CRAN archives.   My problems is cannot work out how to install the R-2.15.1-w.tar.gz package on a windows machine or in fact even if it is the right package for windows.  All the instruction I can find seem to relate to Linux.</p>

<p>Any guidance greatly appreciated.  </p>