I am trying to install the package GO.db using BiocManager, but I keep getting error messages. I have tried installing and reinstalling BiocManager, even updated my version of R from 3.5.2 to 3.5.3. I have other packages like AnnotationDBi and TopGO installed - the latter won't load because it requires GO.db.

The error message I keep getting is:

Bioconductor version 3.8 (BiocManager 1.30.4), R 3.5.2
  (2018-12-20)
Installing package(s) 'GO.db'
installing the source package ‘GO.db’

trying URL 'https://bioconductor.org/packages/3.8/data/annotation/src/contrib/GO.db_3.7.0.tar.gz'
Content type 'application/x-gzip' length 31820876 bytes (30.3 MB)
downloaded 30.3 MB

* installing *source* package 'GO.db' ...
Warning in file.copy(f, instdir, TRUE) :
  problem copying .\NAMESPACE to C:\Users\Name\Documents\R\win-library\3.5\GO.db\NAMESPACE: Permission denied
Warning in file(file, if (append) "a" else "w") :
  cannot open file 'C:/Users/Name/Documents/R/win-library/3.5/GO.db/DESCRIPTION': Permission denied
Error in file(file, if (append) "a" else "w") : 
  cannot open the connection
ERROR: installing package DESCRIPTION failed for package 'GO.db'
* removing 'C:/Users/Name/Documents/R/win-library/3.5/GO.db'
In R CMD INSTALL

The downloaded source packages are in
        ‘C:\Users\Name\AppData\Local\Temp\RtmpEpb8dH\downloaded_packages’
installation path not writeable, unable to update packages:
  class, codetools, Matrix
Update old packages: 'assertthat', 'mgcv'
Update all/some/none? [a/s/n]: n
Warning message:
In install.packages(pkgs = doing, lib = lib, repos = repos, ...) :
  installation of package ‘GO.db’ had non-zero exit status

I'm starting to run out of ideas short of deleting R and restarting my collection of libraries from scratch. I tried installing GO.db on the computing cluster I use too, but alas that came up with similar error messages. Running R as an administrator also didn't seem to garner any differences.

Any ideas on how to fix this?