When one repairs their network connection, it clears the NetBT, DNS cache and ARP. Make it an option to clean these using ccleaner on shutdown.
Recently it was posted on other websites that elcomsoft(?) has a tool now that can recover the encryption keys from Truecyrpt by scanning the Virtural drive caches that Windows saves to disk since the encryption keys are stored in memory and are swapped to disk occasionally, and when one goes into hibernate or shtudown, memory is dumped to this windows virtual drive caches and the keys can be recovered from it. Thus, need ccleaner to clean all the virtual disk caches on hibernate or shutdown to destory the contents of this file using multiple pass overwrites to eliminate this problem.