SSAS: Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))

Today, I've no idea what happend to my SSAS suddenly!! but I got that nasty error while browsing one of my cubes.

Searched it down and found that you'll need to re-install the 'office 2003 web components' Although I'm using Office 2010 for the last 2 Months.
Also if you have time, please read that... will explain more Office Web Components “Roadmap”