Download the Oblivion Script Extender (OBSE xOBSE) from this link: https://www.nexusmods.com/oblivion/mods/37952

Copy the files obse_1_2_416.dll, obse_editor_1_2.dll, obse_steam_loader.dll, and the Data folder to your Oblivion directory, typically located at "C:\Program Files\Valve\Steam\SteamApps\common\oblivion".

Ensure that the Steam Overlay in-game feature is enabled. To do this, navigate to Steam > Settings > In-Game and tick the box labeled "Enable Steam Overlay In-Game".

Launch Oblivion either through Steam or by running Oblivion.exe. When launching, OBSE will automatically run alongside Oblivion. To disable this behavior, rename or move the file obse_steam_loader.dll. The use of obse_loader.exe is unnecessary unless you're using the editor.

Download the Unofficial Oblivion Patch - UOP from this link: https://www.nexusmods.com/oblivion/mods/5296

Transfer all files and folders from the downloaded package into the game's Data folder.

Install the Unofficial Oblivion DLC Patches from this link: https://www.nexusmods.com/oblivion/mods/9969

Transfer all files and folders from the downloaded package into the game's Data folder.

Install the Unofficial Shivering Isles Patch - USIP from this link: https://www.nexusmods.com/oblivion/mods/10739

Transfer all files and folders from the downloaded package into the game's Data folder.

Download the Weapon Expansion Pack for Oblivion Nthusiasts from this link: https://www.nexusmods.com/oblivion/mods/35560

Transfer all files and folders from the downloaded package into the game's Data folder.

Download the Oblivion Stutter Remover from this link: https://www.nexusmods.com/oblivion/mods/23208

Transfer all files and folders from the downloaded package into the game's Data folder.

Download the BOSS from this link:
https://boss-developers.github.io/#

Utilize the BOSS tool to organize the mod load order in the game.

Follow this guide precisely as outlined to ensure a bug-free vanilla experience.