hi all i have a problem with my pc, a message appearedcatalyst control centre host application has stopped working as a result my pc is very slow also its difficult to use the internet , i have to refresh just to get a page to load. when page is eventually loaded another msg pops upanother prog has corrupted your default search provider` then goes on to say i can change my provider etc..but doesnt say which prog is the prob.also the users file in my c:/ has disapeared has also all my pics and videos..i use real player and thats claims a fatal exception and shuts down. i uninstalled that but prob remains..scans with mcafee show no known issues as does malwarebytes