I am having a problem installing and updating packages. It doesn't happen
with every package I try to install or update, but most of them.
I get this warning message:
 
Warning: unable to move temporary installation 'C:\Program
Files\R\R-2.8.0\library\file5f906952\rpart' to '4xl@蹲 $2'
 
and most of the files are not moved to the Library folder. It happens
whether I try to install the package direction from CRAN or from a zip file
on my computer.
 
I've tried using different versions of R (2.8.0 and 2.7.2) and the same
problem occurs.
 
Any suggestions would be much appreciated. Thanks,
Jeremy

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