Hi alexm, Sorry for the trouble. As mentioned above by Peru Bob and @Kyle, performance can be affected both because of the computer's hardware and the changes recently made to the software/drivers/OS updates, I agree with them. Also, the project's complexity (plug-ins used, media files used, etc) can also bring the performance issues to occur have a look at this article: Improve performance in After Effects Let us know if any of the suggestions mentioned in the self-help document help to better the performance. Thanks, Shivangi
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