An issue that was identifed a few months ago is slow system startup with your Windows 7 Desktop/Laptop or Windows Server 2008 R2 Server. This is related to a delay in the initilisation of the Microsoft Software Shadow Copy Provider (Deals with Shadow Copy, System Restore and Backup).
All is not lost as this issue can be fixed by applying the latest version of Volsnap.sys to your operating system
Currently the latest version can be found in the following Microsoft Hotfix (KB 2548124) and applies to Windows 7 and Server 2008 R2 – RTM or Service Pack 1 installs.
http://support.microsoft.com/kb/2548124