Editing Trusted Computing (section)

===Users vulnerable to vendor withdrawal of service===
A service that requires external validation or permission - such as a music file or game that requires connection with the vendor to confirm permission to play or use - is vulnerable to that service being withdrawn or no longer updated. A number of incidents have already occurred where users, having purchased music or video media, have found their ability to watch or listen to it suddenly stop due to vendor policy or cessation of service,<ref name="ms_drm">{{cite web|last=Cheng |first=Jacqui |url=https://arstechnica.com/information-technology/2008/04/drm-sucks-redux-microsoft-to-nuke-msn-music-drm-keys/ |title=DRM sucks redux: Microsoft to nuke MSN Music DRM keys |website=Ars Technica |date=2008-04-22 |access-date=2014-05-31}}</ref><ref>{{cite web|url=http://www.fudzilla.com/home/item/3495-yahoo-drm-servers-going-away?tmpl=component&print=1 |title=Yahoo! DRM servers going away |publisher=Fudzilla.com |date=2008-07-29 |access-date=2014-05-31}}</ref><ref>{{cite web|last=Fisher |first=Ken |url=https://arstechnica.com/tech-policy/2007/08/google-selleth-then-taketh-away-proving-the-need-for-drm-circumvention/ |title=Google selleth then taketh away, proving the need for DRM circumvention |website=Ars Technica |date=2007-08-13 |access-date=2014-05-31}}</ref> or server inaccessibility,<ref>{{cite web|last=Fister |first=Mister |url=http://www.shacknews.com/article/62995/ubisoft-offers-free-goodies-as |title=Ubisoft Offers Free Goodies as Compensation f - Video Game News, Videos and File Downloads for PC and Console Games at |date=26 March 2010 |publisher=Shacknews.com |access-date=2014-05-31}}</ref> at times with no compensation.<ref>{{cite web|last=Bangeman |first=Eric |url=https://arstechnica.com/uncategorized/2007/11/major-league-baseballs-drm-change-strikes-out-with-fans/ |title=Major League Baseball's DRM change strikes out with fans |website=Ars Technica |date=2007-11-07 |access-date=2014-05-31}}</ref> Alternatively in some cases the vendor refuses to provide services in future which leaves purchased material only usable on the present -and increasingly obsolete- hardware (so long as it lasts) but not on any hardware that may be purchased in future.<ref name="ms_drm" />