How to delete ads of my twitter and facebook?

[Leslie]

When I was installing a program onto my laptop (which i wish i never now because it didn't work anyways ) it also installed some weird stuff on my internet,for example weird search bars and loads of annoying ads appeared on my twitter and facebook and everywhere. You know those flashy ads that are at the sides of some websites. They never used to be there now i downloaded that and they appear ! is there any way i can get rid of that without having to pay anything? please help.
Thanks.
and on some website there's no ads, but there's like an empty space and a gap where the advert 'should' be.