How to Repair Windows Server 2008 with SP2?

Hello,

I've an Exchange Server 2010 running on Windows Server 2008 with SP2. Both Windows and Exchange is up to date. I install all available service packs and updates. This server is running on CentOS 5 in a virtual environment. The hardware is Dell PowerEdge 1950 server.

[I installed Exchange 2010 on fresh installation of Windows Server 2008. From day 1, I'm experiencing a lot off issues. Event Viewer is filled with huge information. Today the server completely unresponsive. I restarted couple of times and reinstalled .NET framework 3.5 with SP1.]

Issues: I can't open any MMC, When I open Event Viewer, it displays "Microsoft Management Console has stopped working." message. It happens even when I try to open Server Manager and Exchange Management Console. Also Exchange Services are also not responding. Most of the services are in "Stopping" stage.

I ran the Windows Files Scanner command and it displays the information stating that "It found multiple issues but can't fix it."

The system is not responsive most of the times and taking 100% resources. The process named "w3wp.exe" taking almost 50% resources followed by "MSExchangeTransport.exe" process.

Q: How can I reinstall Windows Server 2008 on top of Server 2008 with SP2 and all the updates? Do I need to just reran the SP2 update again?

Any further help would be greatly appreciated. Thank you.