Device manager not opening?

Solution is here........

1. Start- run- cmd 
2.Type 
            %windir%\system 32 &press enter 
3.Type 
            Regsvr32 msxml.dll &prs enter?
4. Type
            Regsvr32 msxml2.dll & press enter
5. type
            regsvr32 msxml3.dll &press enter
6. Exit and restart computer(recommended but not mandatory).