There's a few reason why the plugin failed.
Note - memory size has nothing to do with it.- unless you are using windows 98 and a computer some 15 years old.
1 - the plugin is out of date and may not be compatible with the version of wordpress you are using. When you want to install a plugin from WordPress.org, always check to see if the plugin is compatible with your version. It will always tell you if it has been tested for your version of wordpress.
2 - You are trying to install a file that is not in the zip format. All wordpress plugins must be a zipped file
3 - You unzipped the plugin before installing it. - the plug-in can not be unzipped. install it as is.
Before installing any plug-in, make sure it has the zip extension. Example would be Marcus Grid Tracker plugin. Grid-tracker 5.2.zip
Above are the three main reason.