Have you installed all software updates available from Windows Update?
Have you installed all the software updates from Vaio Update here?: -
http://support.vaio.sony.eu/computing/vaio/downloads/updates/index.aspx?m=VPCY11M1E_S&l=en_GB
Have you deleted or uninstalled any programs?
It sounds like Windows is trying to find some program or library that is no longer there.
Alternatively, you can give your Registry a cleaning to remove any redundant registry keys.
Have a look at System Mechanicm it is available as a free trial if you click on the Free Trial link on the left: -
http://www.iolo.com/system-mechanic/standard/
