Can you repair squeaky floors? (Waldorf, Maryland)

[Leticia Otero]

Hello! We are ready to househack but unfortunately the hardwood floors squeak quite a bit and also you can hear clearly what is spoken upstairs in the basement apartment. Would someone please let me know which would be the best route to fix this issue? We went to the big box stores but they said they don't do this kind of job, they only sell the hardwood to replace the old one but they don't take care of the squeak or insulating to prevent the noise. I would really appreciate any leads to some contractors in the DMV area that have experience with these issues and can quote us a solution. Thanks!