Having the latest VsTortoise Build 28 beta I realized, that the VS2010 process tries to access invalid, non existing paths ...
D:\usr\Shared\Development\...\Trunk\PLANT\...\abc.cpp\.svn\entries
This is very often as the NirSoft.net utility ProcessActivityView told. In 3 hours I could more than 1500 access errors (error code 0xc000003a (STATUS_OBJECT_PATH_NOT_FOUND))!
Perhaps this one reason for having the feeling that my VS2010 is slowing down?