Is there an easy work-around for the update.packages error I'm getting on Windows 10 with R 3.4.0?

> update.packages()
--- Please select a CRAN mirror for use in this session ---
foreign :
 Version 0.8-67 installed in C:/Program Files/R/R-3.4.0/library
 Version 0.8-68 available at https://mirror.las.iastate.edu/CRAN
Update (y/N/c)?  y
Warning in install.packages(update[instlib == l, "Package"], l, repos = repos, :
  'lib = "C:/Program Files/R/R-3.4.0/library"' is not writable
Error in if (file.exists(dest) && file.mtime(dest) > file.mtime(lib) &&  :
  missing value where TRUE/FALSE needed

--


--
Robert W. Baer, Ph.D.
Professor of Physiology
Kirksville College of Osteopathic Medicine
A T Still University of Health Sciences
800 W. Jefferson St
Kirksville, MO 63501
660-626-2321 Department
660-626-2965 FAX

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