Title basically says it all: WMP on my machine decided to stop playing my collection of DRM protected WMV files. And since WMP is the only player that can play back these files, my video collection has become basically useless. And yes, all the files were purchased legally. Figure I'd post that before someone asks. Tried the usual reinstall of WMP via the "Add or Remove Optional Windows Components", which didn't fix the problem. Tired the Security Component Upgrade page (http://drmlicense.one.microsoft.com/Indivsite/en/indivit.asp), but the Upgrade button is disabled regardless of anything I try (Including the Admin account with UAC totally disabled). This has happened on several occasions in the past, and usually, the first two steps will eventually work. But since the Upgrade button on the DRM page is disabled, I suspect I'm now in a state where I can't access any of my videos. And why this keeps happening is beyond me. I've spent the past two and a half hours banging my head against my keyboard. Some help would be great.