There is problem in Internet 6.0 and Internet 7.0 where you cannot delete the button nor configure a button in edit preference.
check the link
and 4.0 download MSXML Service Pack 2 (Microsoft XML Core Services)
Please download msxml.msi out of 5 downloads
While installing choose Customize options
In the next window choose XML SDK with "Entire feature will be unavailable"
and proceed further
: Thanks to Dwarak for his R and D