* installing *source* package 'backports' ...
** this is package 'backports' version '1.5.1'
** package 'backports' successfully unpacked and MD5 sums checked
ERROR: cannot remove earlier installation, is it in use?
* removing 'd:/Rcompile/CRANpkg/lib/4.7/backports'
* restoring previous 'd:/Rcompile/CRANpkg/lib/4.7/backports'
Warning in file.copy(lp, dirname(pkgdir), recursive = TRUE, copy.date = TRUE) :
  problem copying d:\Rcompile\CRANpkg\lib\4.7\00LOCK-backports\backports\libs\x64\backports.dll to d:\Rcompile\CRANpkg\lib\4.7\backports\libs\x64\backports.dll: Permission denied