The G31T-LM has integrated Intel graphics. Without this driver, your screen resolution will likely be stuck at low quality (e.g., 800x600 or 1024x768).
If you have a separate graphics card:
If you search for "lenovo g31tlm motherboard drivers full" on Google, the first 10 results are likely fake "driver update" software. Avoid these at all costs.
Do NOT use:
Safe sources:
Since Lenovo removed direct downloads, here are reliable archives:
If Lenovo’s site doesn’t yield results:
This procedure works for Windows Vista and Windows 8/10 in legacy mode as well.