For Vista is was not possible: You cannot use the ImageX.exe tool as a backup tool on a Windows Vista-based computer http://support.microsoft.com/kb/935467/en-us I haven't tried it with DISM.
I think it's a ASUS OCZ compatibility issue. Try to exchange it at the shop for a different RAM from an other manufacture. Check the RAM compatibility list of your board.
you run the RAM at 533 (1066) MHz and still get the error? In this case the Motherboard seems to be incompatible with the RAM. Try other RAM modules (Corsair, Crucial, ADATA, Kingston)
// // MessageId: STATUS_DLL_INIT_FAILED // // MessageText: // // {DLL Initialization Failed} // Initialization of the dynamic link library %hs failed. The process is terminating abnormally. // #define STATUS_DLL_INIT_FAILED ((NTSTATUS)0xC0000142L) Use the dependency walker to see which DLL is missing: http://blogs.technet.com/b/askperf/archive/2010/06/25/analyze-application-failures-the-easier-way-with-dependency-walker.aspx
you can also try an InPlace upgrade: http://support.microsoft.com/kb/2255099 http://www.sevenforums.com/tutorials/3413-repair-install.html this keeps the programs and repairs your Windows.
do you have the file sysmain.dll in the folder C:\Windows\System32? If not, extract the DLL from your Windows DVD: http://blog.nirsoft.net/2009/09/17/how-to-extract-missing-system-files-from-the-dvd-of-windows-7vista/
You can also update MSE without Windows Update: http://www.howinthetech.com/update-microsoft-security-essentials-signatures-without-windows-update/ // Edit: spelling
the boot is faster: timing bootDoneViaExplorer="78685" bootDoneViaPostBoot="150985" 79s to desktop and 140s to finish completely. You disabled Superfetch which disables all boot improvements. Enable it and run the optimization again.