TINA-TI installation requires approximately 500MB. Installation is straight-forward and it can be uninstalled easily, if you wish. TINA/Spice/TINA-TI: Free even for Enterprise User? - TI E2E
You can download the latest version of TINA-TI directly from the Texas Instruments website . : Go to the TINA-TI tool page. tina-ti download full version free
Stick with TINA-TI from TI’s site — it’s free, safe, and sufficient for most analog circuit simulations. TINA-TI installation requires approximately 500MB