Laptop cursor not working

So I have lenovo thinkbook from last 2 years. So from a few months, **the cursor suddenly stops moving.** Sometimes it's visible but unmovable and sometimes not visible at all. I have tried restarting many times and shut down many times. To make things work, I use the Tab key sometimes and other times, I don't use the laptop at all. Moreover, it's my first laptop so I seriously don't know what to do.

Any help/advice will be appreciated.

Thanks.