运行regedit,删除以下值：
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page=C:\WINDOWS\system32\blank.htm
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page=http://www.51.ca/
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,default_page_url=http://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page=%SystemRoot%\system32\blank.htm
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page=http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page=http://go.microsoft.com/fwlink/?LinkId=69157
重启，再观察
