Can't access "Network and Sharing Center"

[arlab]

The control panel opens fine. I can access all items in the control panel
except "Network and sharing center" and the "User accounts" (I can't access this sections via the taskbar either).

What happens when I open one of the two items is I get a popup saying the
following; WINDOWS EXPLORER HAS STOPPED WORKING.

I used to be able to access these items. And one day, I just coulodn't anymore...

Anyone knows how to solve this? Thanks.

I'm using Vista Ultimate x64

[arlab]

Problem solved. In case, anyone else has this problem, here's the solution.