They are libraries of functions which get called by programs which you have installed and were written in C++. They are not just updates to each other, they contain different functions which will be called by different programs. You may try deleting some but it may be some time much later that you discover the hard way which program needed it when it fails. If you desperately want to try and clean them up you could copy them all to another drive so you can recover the ones you need as and when you find a program fails but when you consider the comparatively small disk space they consume I wouldn't have thought it was worth the potential hassle.