dellboy35 I'm sorry if you took my attempt at explaning my troubleshooting process as some kind of insult. That was not my intention.
There is a difference of opinion here, and you or OP or any other member is free to take any or all or none of the advice offered. You and I arguing over which approach to take will not solve the issue.
I actually agree with the gist of your comments but we diverge when getting down in the details. Our experience with BSODs also differs, and yet I can completely agree with your statement about how reinstalling Windows would not resolve the issue
if the problems were caused by buggy drivers, etc. That does not appear to be the case here, and you can verify that by reviewing the DxDiag results.
I will strongly disagree with your statement of how it's "obvious" that every program needs a computer to be in perfect health. Certainly a broken installation of Windows isn't even going to be functional, but it's not a black or white situation where everything either works or it doesn't. Playing solitare or using Word in no way pushes any limits on a PC, but gaming, CAD modeling and video editing actually do. That's why it's far more likely to run into a crash like this when the system is being pushed, or in this case, being asked to decode a clip in the timeline.
I completely agree that any system restore points or images made
after the issue occurred will not be helpful, and that's why I asked OP to use the oldest restore and then an older image if that didn't work. I have no way of knowing when the problem occurred, but it's possible that restoring to a previous time will solve the problem.
When it comes to guarantees, I will stand by mine because I have seen this type of problem resolved every time a full reinstall is performed. Again, I would not make this statement if I thought that the issue was caused by a bug in PD, a bug in Windows, a problem with a codec or with OP's media. Everyone else can play OP's clips so we know his system should be able to as well, and the question is how best to cure the underlying problem?
I would ask you to reconsider your statement that a new user account will have zero effect. Have you seen how many times that is recommended by Microsoft and others to either troubleshoot or fix some very difficult problems? I don't know if that will work in this case or not, but it is something that could be done quickly and it would be obvious right away if it helped or not.
Finally, I'm not sure if you realize the differences between an in-place reinstall and a full clean installation. An in-place reinstall can address many issues but it leaves in place all the registry settings, DLLs and executable files for all the installed programs, and only a full reinstall can guarantee that the
entire OS is in a known condition.
Based on all the evidence and specifics of this thread, once a full reinstall is completed I am 100% confident that OP will be able to install and update PD and his clips will play as expected.
If you have other ideas for helping OP, please share them. I'd be happy to be proven wrong about an OS reinstall, especially if there's a better, faster, easier method. Everyone benefits from knowledge shared and discovered on this forum!
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