Yep, most laptops have a physical switch to disable the wifi, or may have a keystroke combination using the "fn" key and one of the function keys or you can do it via the software.
just an example
I think this is from a Lenovo, just check your function keys for the "Wifi" symbol
or maybe something like this example from an IBM
__________________
Steve
'08 Boxster RS60 Spyder #0099/1960
- never named a car before, but this is Charlotte.
'88 targa
SOLD 2004 - gone but not forgotten