Installing IIS in Windows 7

I have tried to install the IIS on windows 7. But I am getting the ERROR -

Code:

---

an error has occurred. not all of the features were successfully changed

---

I have searched on the net & found that the following solution : -

Code:

---

1) Un-Installing the .Net Framework 3.5(Turn Windows Features ON/OFF)
2) Reboot
3) Installing the .Net Framework 3.5(Turn Windows Features ON/OFF)
4) Install IIS

---

I have UnInstall the Framework successfully. But when I tried to Install it again. I am getting the same Error -

Code:

---

an error has occurred. not all of the features were successfully changed

---

ANY SUGGESTIONS??