Switching to VirtualEnv from Conda might cause some issues with the system path's python and pip installs.
There seems to be a bug.
pip install pandas will setup the install in the Anaconda folder. running pip or pip3.exe files in the scripts folder to install results in error.
Fatal error in launcher: Unable to create process using '"d:\projects\python\venv\scripts\python.exe" "D:\projects\python\venv\Scripts\pip3.exe" install pandas