The jvwinstl.cmd is used to install the JView and JView Pro products. You can bypass this install program and do a manual installation by unzipping the jvw_all.zip file into the directory of your choice. It will be your responsibility to setup the PATH and LIBPATH variables correctly as well as choosing an appropriate TMP or TEMP variable. The installation is very simple and you will be prompted for most information. JView does not modify your system ini files and so can be easily removed.