[BioC] unable to install package

ashok raja balla [guest] guest at bioconductor.org
Thu Nov 7 03:43:32 CET 2013

how to install bioconductor packages ?
I'm unable to install any package from bioconductor.
im using this in Win 7 home basic. please help me.

 -- output of sessionInfo(): 

> biocLite()
BioC_mirror: http://bioconductor.org
Using Bioconductor version 2.13 (BiocInstaller 1.12.0), R version 3.0.2.
Warning message:
installed directory not writable, cannot update packages 'foreign', 'lattice',
  'Matrix', 'mgcv' 
> biocLite(affy)
Error in match(x, table, nomatch = 0L) : object 'affy' not found

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