Crystal report CrystalDecisions.Shared conflict with 13.0.2000.0 and 11.5.3700.0 version

Hi,

  I have visual studio 2010 and installed crystal report 13 on my pc in order to run the crystal report on visual studio.  however, I already have crystal report 11 on my pc, so, I uninstalled it.  but when I load the crystal report web page, it display a message is crystaldecisions.shared is conflict with 13.0.2000.0 and 11.5.3700.0,

  they are located in C:\Windows\assembly  path, I tried to uninstall the CrystalDecisions.Shared 11.5.3700.0, but display "access is denied", so could you help me how to solve this problem please ?

Thanks

Kelvin