OPen an elevated command prompt :
Go Start > All Programs > Accessories
Right click Command Prompt and select "Run as Administrator"
In the black box that opens copy and paste the entire command below into it pressing enter on completion :
FORFILES /P %WINDIR%\servicing\Packages /M Microsoft-Windows-InternetExplorer-*9.*.mum /c "cmd /c echo Uninstalling package @fname && start /w pkgmgr /up:@fname /norestart"
Note: During the run procedure, an error such as 0x80040005 or 0x80070005 might be reported. We can click "OK" to ignore it
Reboot on completion
Then install IE10