Modification of the Unofficial Dawnguard Patch, fixes the "Office Add-on" Dawnguard that don't have fixed developers.
Unofficial Skyrim Patch
ATTENTION! Unofficial patch will only work on versions of Skyrim not below 188.8.131.52.8.
How to install Unofficial Patches:
With the installation of all informal patches, their order should be:
-Skyrim.esm -Update.esm -Unofficial Skyrim Patch.esp -Dawnguard.esm -Unofficial Dawnguard Patch.esp -HearthFires.esm -Unofficial Hearthfire Patch.esp -Dragonborn.esm -Unofficial Dragonborn Patch.esp -[Other ESM]. -Official high resolution textures. -The unofficial patch to the textures high resolution -[Other ESP]
-The above actions will help avoid conflicts with other modifications.
-USKP (and other mods) can sometimes lead to crashes of Skyrim at main menu (pressing ESC → Menu → exit the game). This does not entail any additional problems, because in any case the player goes on the menu, that is, if you restart the game, it will be in this menu (which is undoubtedly better than the menu in the game, as a guarantee that the data from the old session is left). This may be caused by an attempt to clear the engine data and finding the data that they do not like.
-USKP (and other mods) can cause temporary loss of static objects (walls, floors), if you are loading more than one fashion. This problem does not occur if you have only one mod. The bug can occur even in cells that are not affected by the modes. Apparently, this is a problem of the engine with layers. Normally, restart the game solves the problem. The exact explanations of the causes of the problem at the moment.