It was made a version (Assistat 6.2) of the software for the variance analysis, Assistat, to work in the Windows operating system, since the previous versions were conceived to work in the DOS operating system DOS (operation system in disk). That software makes analysis of the variance of experimental data, from the four more usual experiments, which are; entirely cazualized, blocks at random subdivided portions and factorial. It applies jointly the "F" test to verify the effects significance and Turkey’s test to compare the effect averages. In the experiments cases, subdivided portions and factorial, it also applies crossed Turkey’s test in interaction averages, when there is interaction significant effect. Assistat 6.2 also has David’s test to verify if the data has normal distribution (of Gauss’) and with the U test to compare two samples.