Yesterday I executed Microsoft’s OnceCare from within Windows Live. The full scan took me some hours with the following result:
Information from OneCare help: Over time, the Windows Registry can begin to contain information that’s no longer valid. Maybe you uninstalled an application without using the Add or Remove Programs function in the Control Panel, or perhaps an object or file in the registry got moved. Eventually this orphaned or misplaced information accumulates and begins to clog your registry, potentially slowing down your PC and causing error messages and system crashes. You might also notice that your PC’s startup process is slower than it used to be. Cleaning your registry once a month via the Windows Live OneCare safety scanner is the easiest way to help avoid these common problems.
Click Next to clean registry and temporary files:
Result in Windows Live: