Information for Service Pack 1 users

If you have updated your system to Service Pack 1 (SP1), there are some new elements to consider regarding your system files. When you install SP1, what are you doing is, precisely, updating your system files. The SP1 installer will shutdown WFP in order to replace your files at the fly, and will overwrite almost all the content of the System32 folder.

But, as a way to keep separated the files updated from those don’t updated, the SP1 installer will create a new backup folder, plus Dllcache. This new folder is created here:

X:\Windows\ ServicePackFiles\ i386

Be aware that Windows won’t delete the Dllcache folder. There it will keep the files that haven’t been updated, so now we have to deal with two system backup folders, the well known Dllcache and the new i386 folder. What we’ll need to do in order to replace our system files, is check when the file we’re tying to replace is located in the Dllcache folder or when is located in the new i386 folder (don't worry, they never will exist in both folders). Then we’ll can proceed and replace it using the technique of our preference.

Note: If you’re using the second technique described in this tutorial, (rename and move the Dllcache folder), then you might want to rename and move the i386 folder too in order to get the same result.

Things you must know