How best can I upgrade my computer

If your computer is for internet usage only then there is no purpose in upgrading the system. A basic Pentium 2 system is more that adequate for internet usage and there would be no significant benefit from having a more modern configuration. If you do use it for other purposes and intend to upgrade then you really need to consider an all round improvement. Upgrading the processor without upgrading the RAM would serve little purpose, as would the reverse combination.

do you mind sharing your computer specs so that we can help you better. We have to know whether your specs are still okay or not. I upgraded my computer like 3 years ago and it's still good although i just upgraded my video card.

Even if your computer is old, as long as it is working fine, why upgrade? You are obviously able to use it for the Internet, and that is your main focus area. The download speed depends more on the Internet connection and less on the computer. An upgrade would be useful if you had to do a lot of processing that needs computing power. Since that does not appear to be the case, why bother? I do a lot of work on Excel and Powerpoint. Though my laptop is three years old, it works fine for these applications and for the Internet as well. So, I'm happy with it. Follow the old adage, " If it ain't broke, don't fix it."

if you just use it internet i have to agree that you have no need to upgrade it. if you want to make it more efficient you should focus on the os. switch to a lighter os, defrag the hdd, uninstall software you dont use, change os settings to improve performance like disabling services you dont need, or even reinstall the os.