When you say your google page has changed what do you mean?
if it's just changed your home page then change it back to whatever you want, tools > internet options and on the first tab you can set your homepage to any page you want.
errrr, cokkies folder has gone.... why do you need to be able to see your cookie folder.. it's normally a hidden folder so just change the folder options to display hidden files and folders.
on any explorer window select tools > folder options then click on the view tab and put a tick in the option to show hidden folders and files (not recomended BTW)
It's best to download the updates... some of them can be security critical updates