Unable to free up space on hard drive even after cleaning

I have tried several times (using the macbook cleaner pro) to free up space on my hard drive, but to no avail. I am told that I have no free space even though there is no way I have already clogged my computer with 250 GB of memory.

When I go to "manage" my storage, the "applications" section continuously says "calculating," but never gives me a readout of how much space it is using. Although my pictures, music, documents, etc. take up maybe 10 GB, I'm told there is still no space, leading me to believe that I might have a virus.

Has anyone else faced this issue? If so, how did you resolve/not resolve it (minus throwing the macbook out a window)?

Thank you!