have you turned off the windows roll back facility as well as clearing them? some will reboot with the pc if it is still on......... only thing is you then loose the ability to roll back to any saved points you had, also start in safe mode and run a wash there to get rid of them. if it is the old CoolWebsearch problem as mentioned, there is a specific free download programme for specifically getting rid of it, google it. to change the web link internet express opens in btw go on your internet browser page left click tools then internet options and then change the address the page opens in there.