[R-br] Problema com a instalação de pacotes no R!

[Andre Oliveira]

bom dia,
mesmo depois de executar o R como administrador tenho alguns problemas para instalar alguns pacotes no R (nlme e lubridate entre outros).  Alguma dica para solução deste problema? 

 > install.packages("nlme")
Installing package into 'C:/Users/andreoliveira/Documents/R/win-library/3.6'
(as 'lib' is unspecified)
tentando a URL 'https://cran-r.c3sl.ufpr.br/.../contrib/3.6/nlme_3.1-147.zip'
Content type 'application/zip' length 2374568 bytes (2.3 MB)
downloaded 2.3 MB

package 'nlme' successfully unpacked and MD5 sums checked
Warning: cannot remove prior installation of package 'nlme'
Warning: restored 'nlme'

The downloaded binary packages are in
 C:\Users\andreoliveira\AppData\Local\Temp\RtmpMH69CO\downloaded_packages
Warning message:
In file.copy(savedcopy, lib, recursive = TRUE) :
 problem copying C:\Users\andreoliveira\Documents\R\win-library\3.6\00LOCK\nlme\libs\x64\nlme.dll to C:\Users\andreoliveira\Documents\R\win-library\3.6\nlme\libs\x64\nlme.dll: Permission denied


att,.André 
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