Thank you so much for all your help, my Pc seems to be running ok now It has now got its old speed back however I am still having a few other problems, my search companion is blank i have no access to MSCONFIG, when i try to access this is tells me that windows can not find it. Windows media player will not load either and when i try to access IE i get a blank page which seems to be stuck on this link http://runonce.msn.com/runonce3.aspx. if i type Google into the address bar this works but i often get a yellow triangle and 'error on page'. when trying to click on links within a page nothing happens. I dont know if you can help me with this also or if i will have to post somewhere else.