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We have a UMDF driver written for Vista in UMDF 1.11 and we want to run it on Windows XP. As XP supported latest up to UMDF 1.9, we are not able to install 1.11. The errors are like supporting wudfcoinstaller was not found or WUDFRd.sys not found. We need to have supporting files for UMDF 1.9 in order to make it work. Also, we found that these header files are a part of this KB "KB970159"(https://support.microsoft.com/en-in/help/970159/user-mode-driver-framework-version-1-9-update-for-windows-xp-for-windo). We are not able to find this update for Windows XP. Where can we find this? or is there any alternate way to make 1.11 run on XP?
Note all of the above is to compare a KMDF driver that works fine to UMDF which is partially written and we are trying to complete missing part. This is intended for Win 10 but KMDF driver we have works only on XP so we're trying to make UMDF work on XP too in order to complete the missing part and then we will make it compatible to Win 10. Please share your thoughts.
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