Since I've upgraded my Windows 2008 SP2 x64 Enterprise server to R2, this error is listed every 2 minutes in the System log file, as a Warning:
Component: Software Version Agent
Error: Could not read from the registry sub-key.
Cause: This error can be caused by a corrupt registry or a low memory condition. Rebooting the server may correct this error.
Rebooting the server didn't correct the error and the server doesn't show low memory condition. Thanks for help.