Why my Computer or Laptop is slow?

One of the most common reasons for a slow computer is programs running in a slow computer in the background. Remove or disable any TSRs and startup programs that automatically start each time the computer boots

My computer is still slow while browsing. What else do I need? I have a stable wired connection.

Close the tabs you are not using. Or avoid opening a lot of tabs while browsing. Delete unused files and apps. Just reinstall when you need to.