Hello SamJ969,
Please try the steps outlined below, to see if you can enable indexing.
To disable or enable the service, run **"**services.msc" either direct from the start menu or via the run box. Once loaded, scroll down the services list, right click on Windows Search and then click Properties. You will then have a pop up window, confirm under 'Startup type' confirm it is set to 'Automatic (Delayed Start). Then select apply.
Please let us know status.