Exploits do appear from time to time which can potentially allow malware to be installed onto a computer if the user clicks the Yes button when visiting a website created by a hacker, but these exploits are rare and fixed pretty quickly.Īlthough the Java Runtime Environment (JRE) package requires installation and there is no official portable version, it is still possible to run applets and applications without installing Java into Windows. The small utility JavaRa was designed to help clean out any old installation files. One thing a Java install does do which annoys a lot of people is leave the previous versions in place to supposedly help with compatibility. Some users claim it slows their computer down because of the extra processes loading with Windows such as the Quick Starter process jqs.exe. One good thing about Java is it’s cross platform and runs in it’s own self contained virtual machine, meaning the same applets and programs can be run on different operating systems such as Windows, Linux and Mac OS without using different code. Most computer users have heard of the Java programming language because it will be installed on a lot of machines and required on some websites.