The Elder Scrolls V: Skyrim is an open-world (sandbox) RPG video game developed and published by Bethesda. The game is the fifth installment in the Elder Scrolls series which takes place in the same universe. Skyrim has thousands of mods available and is one of the most modded games of all time.

Issues

ENB poor performance

An ENB is a mod that adds high dynamic range and other visual enhancements to the game, but it often comes at the price of a significant drop in performance or even stuttering where the game will temporarily freeze when loading new environments or turning around quickly. There are a few ways in reducing the performance hit of ENBs.

Solution 1 Disable ambient occlusion and depth of field. These two options greatly affect the game's performance as they require complex algorithms to function.

Press Shift+Enter
Skyrim Shift+Enter ENB menu
Use the mouse to untick or uncheck ambient occlusion and depth of field

Solution 2 Decrease anisotropic filtering. Anisotropic filtering, like ENBs, can utilize a lot of graphics memory leaving the video card with little free memory. This can result in poor performance but also stuttering. Turning around in the game quickly or moving from one place to another as the new environment loads can cause temporary freezing or stuttering.

Open the Steam directory by Right clicking on Steam and selecting Open file location
Go to the Skyrim directory, usually C:\Program Files (x86)\Steam\SteamApps\Skyrim
Skyrim enblocal.ini file
Open the file enblocal.ini
Press CTRL+F and search for MaxAnisotropy=
Decrease the number in half. So if it says MaxAnisotropy=16 set it to MaxAnisotropy=8
Save the file and exit