Winrar is one of the best file archiver and compressor software I am using from last few years and it works flawlessly. supports most of the archive format like ISO, ZIP, RAR, TAR, ZIPX and whatnot. the best part is that it is very light weights only 4MB do not take much resources and UI is very easy and responsive.also you can set password for it when you create an archive Testing archive is my favorite option whenever I download or archive any compressed file or copy to Pen Drive or HDD I do test for reliability cause some times when you copy Archive they may get corrupt. it is also easy to archive files thanks to context menu option.