After installation of CIS (which I had been waiting for like a kid waiting for his decoder ring in the mail
), I find I am unable to defragment the drive it's on (c:), because "some files could not be compacted" (or something like that). When I click on the "Show Report" button to display the problem file(s), it displays the file "sfi.dat" in the Windows\System32\Drivers directory. I am unable to even copy the file (it complains that the file may be already in use...?!?), and I have reproduced this error on two separate clean installs of the OS (and, by default, CIS) on two different machines. Is this file dynamically created? If so, how do I delete it and allow CIS to create a new, clean one? Thanks!