R CRAN, install library Rcpp fails after R3.2 upgrade

Question

I upgraded from R-3.1 to R-3.2. OK ( Standard upgrade)

But this upgrade seems to have lost all the installed packages ( ggplot2, quantmod, Rcpp among dozens and doze

Answer 1

I was doing a first time install with R3.2.0 & installing "devtools" package and faced a similar error:

Warning in install.packages : 
unable to move temporary installation 
‘C:\Users\ravi\Documents\R\win-library\3.2\file1f7414af6d89\Rcpp’ 
to ‘C:\Users\ravi\Documents\R\win-library\3.2\Rcpp’

Many other packages were installed but the Rcpp. And the devtools package wasn't showing up installed (library function failed). After installing just the Rccp package again however the library function worked for me and find_rtools() returned true.