Some of the icons have desepeared

Hello,



my laptop had like breake down I think becouse last night all the icons have desepeared and you go to the all programs they ar all there but wen you try to open one it wont open, And I keep on geting this little wendow it says invalid or somthing like that , cant remember now, If someone knows what's going on, pls do let me know,lots of weard things happening to my laptop resendly, I allsow have probleme installing this code 57 wenever I do try to installit its allways unsecsesfull.