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The AACS key extractions highlight the inherent weakness in any DRM system that permit software players for PCs to be used for playback of content. No matter how many layers of encryption are employed, it does not offer any true protection, since the keys needed to obtain the unencrypted content stream must be available somewhere in memory for playback to be possible. The PC platform offers no way to prevent memory snooping attacks on such keys, since a PC configuration can always be emulated by a [[virtual machine]], in theory without any running program or external system being able to detect the virtualization. The only way to wholly prevent attacks like this would require changes to the PC platform (see [[Trusted Computing]]) which could provide protection against such attacks. This would require that content distributors do not permit their content to be played on PCs without trusted computing technology, by not providing the companies making software players for non-trusted PCs with the needed encryption keys.
On 16 April 2007, the AACS consortium announced that it had expired certain encryption keys used by PC-based applications. Patches were available for [[WinDVD]] and [[PowerDVD]] which used new and uncompromised encryption keys.<ref>
{{cite web| url= http://www.aacsla.com/press/| title= Press Messages: AACS – Advanced Access Content System| access-date= 2 May 2007| archive-url= https://web.archive.org/web/20070430070403/http://www.aacsla.com/press/| archive-date= 30 April 2007| url-status= dead| df= dmy-all}}
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