clumsy

hello, can you help?
the font on my computer is the same i think but suddenly the letters have become all thick and clumsy looking, it looks like the type face of a clunky old computer. also, on the toolbar area, where there are usually arrows for the spellcheck or so these have been replaced by the number "6"...does anybody know what is happening to my computer?
thanks.

ps. even on the select an icon for this post there isnt the usual hole to click on...just a grey scratchy blur.