i really wish GGG wouldnt have removed the white item filter from the UI, without at least making sure that everyones filter got set back to "FALSE" (show white items)...
i see more and more people who are "brand new" having this issue..
since patch 0.10.0 (open beta) GGG removed the UI option to not show white items on the ground. this was useful in closed beta, when this game was a loot pinata..
since then many things have changed and the need for a filter for white items has gone by the wayside.. the UI option is gone, however the config variable is still in the game and i expect it to be depreciated later in development.
close the game if open, find your config, mine is my docs > my games > path of exile > production_config.ini
once inside find:
filter_white_items=
yours probably says "true" you want to change that to false..
if filter_white_items= is already set to false, set it to true, then save the file, start the game, log in, maybe even log into a character, then exit, the game, open your config back up, and change it back to "false", save file, restart game..