hi... since SP1 final build 18000 is out, i am trying to update 2 PCs. Both have different features removed like: - sidebar - windows mail both PCs fail with a call to exactly these features: PC1 2008-01-29 14:25:44, Error Failed to find the CixTarget for Container x86_microsoft-windows-mail-core-dll_31bf3856ad364e35_6.0.6001.18000_none_587ec186254a22ac\msoeres.dll 2008-01-29 14:25:44, Error DpxException hr=0x80070002 code=0x020109 2008-01-29 14:25:44, Info CSI 00000032@2008/1/29:12:25:44.666 CSI Transaction @0x2f95568 destroyed 2008-01-29 14:25:44, Error CBS Failed to pre- stage package: VistaSP1-KB936330~31bf3856ad364e35~x86~~6.0.0.18000 I already copied and created the Windows Mail folder on the first PC, with no success. PC2 2008-01-29 12:01:02, Error Failed to find the CixTarget for Container x86_microsoft-windows-sidebar_31bf3856ad364e35_6.0.6001.18000_none_cedcabbd26a81ad6\sbdrop.dll 2008-01-29 12:01:02, Error DpxException hr=0x80070002 code=0x020109 2008-01-29 12:01:02, Info CSI 00000b66@2008/1/29:10:01:02.967 CSI Transaction @0x5d54ce0 destroyed 2008-01-29 12:01:02, Error CBS Failed to pre- stage package, package: KB936330~31bf3856ad364e35~x86~~6.0.1.18000 thanks for any help, but i`m guessing reinstall is the key here