how can i speed up my dell vostro 1510 laptop?

By getting an Inspiron 15 Laptop? Try asking the question in the Dell forums.

There are many ways by which you can speed up your device.

But the best ways is by removing non needed programmes. Alternatively you can run CCleaner to do this.

If you need more information you can read this guide: https://thetechnical.life/speed-up-laptop/