However two folders on my desktop now randomly have weird coded names like %*[email protected]£*(&^ and ww2w. Not sure if it's anything to do with it? I haven't done anything else unusual with my laptop lately.
What should I do about this? is it a real virus/spyware infection
And reformat your hard drive and do a fresh install of everything - as if it were a brand new factory fresh MacBook.
Then reinstall your required software and re-access your data.
Google for instructions. Eg Mac hard drive formatting