Isaac Sim install

 Well, omniverse launcher and isaacgym have been deprecated. So here is the journey back/forward.

Enable long path support (Since I'm now using a new PC with win 11 pro): HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem LongPathsEnabled (Type: REG_DWORD) must exist and be set to 1.

Install UV standalone https://docs.astral.sh/uv/getting-started/installation/

Move to C:\\envs

:: create a virtual environment named env_isaaclab with python3.11

uv venv --python 3.11 env_isaaclab

:: activate the virtual environment

env_isaaclab\Scripts\activate

env_isaaclab\Scripts\activate : File C:\envs\env_isaaclab\Scripts\activate.ps1 cannot be loaded because running scripts is disabled on this system. For more information, see about_Execution_Policies at

https:/go.microsoft.com/fwlink/?LinkID=135170.

At line:1 char:1

+ env_isaaclab\Scripts\activate

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : SecurityError: (:) [], PSSecurityException

    + FullyQualifiedErrorId : UnauthorizedAccess

Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass

Select Y.

Environment now activates.

Next step, upgrading pip. But pip is not installed, so: 

python -m ensurepip --upgrade

then

python -m pip install --upgrade pip

uv pip install torch==2.7.0 torchvision==0.22.0 --index-url https://download.pytorch.org/whl/cu128