Ars Technica has a useful post showing how to remove the useless software (crapware) that comes pre-installed on Windows 8 computers. The specific software of course varies between PC manufacturers, but the general idea is the same in all cases: most, if not all, of the software added by PC builders can be safely removed.

The approach used in this article is to reinstall Windows 8 from scratch, which is certainly an effective way to get rid of crapware. However, simply disabling and uninstalling said crapware is usually sufficient.