Customers have been reporting a problem with corrupted files when running the Update program from SP2. Microsoft has investigated the problem and has found that it is related to the way the binaries are packaged together using authentication for web distribution. This problem only occurs when customers download SP2, expand it, and copy the files from one machine with an NTFS partition to another machine over the network (and only when the two systems negotiate raw write mode between them). When the Update program is run from from this second computer, a message appears after rebooting stating that either NTFS.SYS or ADVAPI32.DLL was corrupted. The files that were affected by this problem are the following: NTFS.SYS ADVAPI32.DLL WINHLP32.EXE HALAPIC.DLL We have resolved this problem by repackaging the binaries. The binaries in SP2 have not changed - they have simply been repackaged. The new self-extracting executables are no longer zipped with the authentication option. This *does not* affect the CD-ROM version of the Service Pack. Therefore: 1) Customers who downloaded SP2 and encountered this file corruption during the Update process should download the new version of the Service Pack and install it. 2) Customers who used the CD-ROM version of SP2 are not affected and therefore do not need to make the change.