from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Software that is installed without the user's knowledge or consent, often bundled with another product.
foist + -ware (Wiktionary)
One is that the beta is a clean, plain Microsoft install - no anti-virus, no cruft and clutter, no OEM foistware.
Viewpoint is considered foistware and is not needed on your computer.