An installer file is a type of computer file that helps you install a program or software onto your device. It usually contains all the necessary files and instructions to set up the software correctly. Full definition
Right now there's no way to access the Google Android Market, which means you'll have to manually download apk installer files for each app you install. (liliputing.com)
If not, you can also find apk installer files for GO Launcher EX and many other app launchers on the web. (liliputing.com)
This will free up the space used by NVIDIA installer files on your system. (howtogeek.com)