Can I interchange my "Home, End" keys with "PageUp, PageDown" keys on dell latitude laptop?

Since you are on Windows, I recommend AutoHotkey.

Once installed you can remap Home to PageUp, End to PageDown, and vice versa, with a simple AutoHotKey script.

Just create a text file called remapKeys.ahk and execute (double click) it:

Home::PgUp
End::PgDn
PgUp::Home
PgDn::End

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Documentation:

• AutoHotkey
• Remapping Keys and Buttons