Portable software is software if you want to run it does not need install, so it is more practical and easily portable but the software can only be used on Windows XP. Portable software does not meet the Registry in the system 'C'. The registry software that too much will make our computers slow, for it to not meet the system 'C' we use this portable software. To create portable software we need an applications called "THINSTAL".
If you want more clearly in the manufacture of portable software you can read my next article.