I think your new computer is an HP/Compaq LAPTOP. Right?
If so, the problem is that you have to press the "Fn" key at the bottom left of your LAPTOP keyboard. HP has some stupid setting so that pressing F5 actually "opens your default browser", and the other Fkeys do things like volume and screen brightness.
See the picture below, in the attachments.
You can disable this setting, Hewlett Packard actually has a link on their website, HERE That shows you how to do it.
I am reprinting it on this forum, in full, in case the link gets broken:
On most HP and Compaq notebook PCs, it is necessary to press and hold the function key (fn) while pressing one of the f1 through f12 keys to activate the default functions; such as, increasing or decreasing the brightness of the display, the sound volume, sleep, keyboard lock, etc. On the HP Envy notebooks and other notebooks with advanced BIOS options, the function keys can be configured so that it is not necessary to press and hold the fn key.
1 - Function Keys f1 through f12 2 - Configurable Function key fn
Disable fn in the BIOS To disable, or enable, the function key (fn) in the BIOS, do the following steps.
Press the power button to turn on the computer.
Press the f10 key to open the BIOS setup window.
Use the right-arrow or left-arrow keys to navigate to the System Configuration option.
Use the up-arrow or down-arrow keys to navigate to the Action Keys Mode option, and then press the enter key to display the Enable / Disable menu.
Select the desired mode: *Disabled : Requires pressing fn key + f1 through f12 to use the action as indicated on the action key. For example, if Disabled , pressing fn + f11 will mute the sound as indicated on the key on this model PC. Alternatively, pressing f11 only will minimize and maximize a web browser if open. The action keys may vary depending on the model of notebook. *Enabled : Requires pressing only f1 through f12 to use the action as indicated on the action keys. For example, if Enabled , pressing f11 only will mute the sound as indicated on the key on this model PC. Alternatively, pressing fn + f11 will minimize and maximize a web browser if open. The action keys may vary depending on the model of notebook.
Press f10 key to save the selection and restart the computer.
The function key (fn) option can be reset at any time.
The other image below shows the correct BIOS screen mentioned in the quote.
Please come back and mark this post as solved if I have helped you to fix it :)