Hi everyone, first of all I apologize for my English, it isn't my mother tongue.

If anyone can help me I will be very grateful.

This is my problem:

Even the entire game stop working: I can't open the menu wiht Tab, I can't open the map, I can't interact with NPCs or open any door.

When this happends I need to close the game because it's impossible to play.

I don′t know if is anything wrong with the Downguard DLC, or its something wrong with my Mods. I have already reinstalled Dawnguard and it changes nothing.

I have already cleaned the main files too with Tes5Edit.

This are my active Mods:

Sabre Gear Backpack

NorseViking Chainmail

Immersive Armors

IPM- More Realistic Bows and Crossbows

Better shaped Weapons - BSW

Arms and Armour 5 Axes Maces (By Andragorn)

The Stamford

JaySuS Swords

closer Quivers and Longer Arrows

Immersive Weapons

The Chronicles of Steel

Immersive Settlements

City Relighting with Day-Night Light Schedule w-Water Arrows

Beards

Distant Detail

Enhanced Distant Terrain

Lanterns of Skyrim

Bellyaches Animal and Creature Pack

Skyrim Performance PLUS

Realistic Nights

Realistic Lighting Overhaul

Enhanced Blood Textures

Real Shelter

No Snow under the Roof

Camping Kit of the Northern Ranger

Camping Lite

Vinis Legit Food and Rest

Various guard outfits for Every cityTS Edition

Footprints

iHUD

Immersive Patrols

Light up the night - People Have Torches

Immersive NPC in the dark

Wet and Cold

Deadly Combat

Sneak Tweak

Civil War Overhaul

SkyUI

SkyTEST

ABT - Arrows and Bolts Tweaks

Unofficial Patch (Skyrim, dawnguard and Hearthfire)

TK Recoil

Dragon Combat Overhaul

Perhaps a mod conflict? Try unchecking all your mods (you can leave the DLC checked), start the game and try to get to dawn fort. DONT overwrite any save while doing this. DONT load autosaves either after this.