I recently installed a particular font (helvetica neue) and now for some reason any website or program that doesn't use its own specific font uses the helvetica one, rather than the standard one it used to. This is really frustrating as it's not the easiest font in the world to read. I have tried just removing the font but it won't let me as it tells me it's in use (even in safe mode). I even tried a system restore, which resulted in a blue screen of death for some reason, and the restore failed.
Does anyone know what might be going on here?