"
my small brother went to device manager and deleted my wireless adaptor"
Only the
driver has been deleted, not the actual wireless adapter -
All you need to do is download & install the driver from Toshiba's support website.
You'll need to know the laptop model & possibly it's serial number to be sure of getting the correct driver.
Make sure you use the appropriate Toshiba website that covers your region or country:
https://www.toshiba.co.jp/worldwide/region/index.html
Use ethernet cable to connect your laptop to the router so you can download the driver.