In the worst case, if any installation requires admin privilege, then you will not be able to use 7zip because there is no portable version of 7zip. But, in Windows 10 and later versions of Windows 7(if my memory serves me well), extracting zip file is possible without any program installation: just open the .zip file with "Windows explorer" and extract them. However, this only works a normal zip file, not with JDK installer.