R-加载dplyr问题

Question

我是R和stackoverflow的新手。我面临的问题是，当我尝试从软件包中加载dplyr时，出现以下错误

library(dplyr)
Error: package or namespace load failed for ‘dplyr’ in inDL(x, as.logical(local), as.logical(now), ...):
 unable to load shared object 'C:/Users/mhashim/Documents/R/win-library/3.4/rlang/libs/x64/rlang.dll':
  LoadLibrary failure:  Access is denied.
In addition: Warning message:
package ‘dplyr’ was built under R version 3.4.4 

我尝试更改库路径 .libPaths( c( .libPaths(), "C:/new_software/Rpackages") )，但无济于事。