Greetings!

 i am getting the same problem

source("https://bioconductor.org")
Error in file(filename, "r", encoding = encoding) : 
  cannot open the connection
In addition: Warning message:
In file(filename, "r", encoding = encoding) :
  InternetOpenUrl failed: 'A connection with the server could not be established'

sessionInfo()

R version 3.3.2 (2016-10-31)
Platform: i386-w64-mingw32/i386 (32-bit)
Running under: Windows 7 (build 7600)

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] stats4    parallel  stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
 [1] GenomicFeatures_1.26.3     AnnotationDbi_1.36.2       DESeq2_1.14.1             
 [4] SummarizedExperiment_1.4.0 GenomicRanges_1.26.3       GenomeInfoDb_1.10.3       
 [7] IRanges_2.8.1              S4Vectors_0.12.1           affy_1.52.0               
[10] Biobase_2.34.0             BiocGenerics_0.20.0       

loaded via a namespace (and not attached):
 [1] RColorBrewer_1.1-2       checkmate_1.8.2          cluster_2.0.5           
 [4] magrittr_1.5             acepack_1.4.1            gtable_0.2.0            
 [7] zlibbioc_1.20.0          preprocessCore_1.36.0    memoise_1.0.0           
[10] Rsamtools_1.26.1         data.table_1.10.4        RCurl_1.95-4.8          
[13] base64enc_0.1-3          XVector_0.14.0           htmltools_0.3.5         
[16] stringr_1.2.0            genefilter_1.56.0        splines_3.3.2           
[19] BiocInstaller_1.24.0     Formula_1.2-1            lattice_0.20-34         
[22] rtracklayer_1.34.2       survival_2.40-1          annotate_1.52.1         
[25] htmlwidgets_0.8          plyr_1.8.4               locfit_1.5-9.1          
[28] Biostrings_2.42.1        GenomicAlignments_1.10.0 knitr_1.15.1            
[31] gridExtra_2.2.1          Matrix_1.2-8             digest_0.6.12           
[34] colorspace_1.3-2         geneplotter_1.52.0       stringi_1.1.2           
[37] lazyeval_0.2.0           Hmisc_4.0-2              RSQLite_1.1-2           
[40] tibble_1.2               affyio_1.44.0            rpart_4.1-10            
[43] backports_1.0.5          htmlTable_1.9            xtable_1.8-2            
[46] BiocParallel_1.8.1       munsell_0.4.3            DBI_0.6                 
[49] Rcpp_0.12.9              biomaRt_2.30.0           XML_3.98-1.5            
....