Windows cycles through applications and display keeps flashing when opening a dialogue box (e.g. preferences) within lightroom classic

Question

My configuration:Processor    AMD Ryzen 7 5800XT 8-Core Processor (3.80 GHz)Installed RAM    32.0 GB (31.9 GB usable)Graphics card    NVIDIA GeForce RTX 3070 (8 GB): latest Studio Driver is activeStorage    459 GB of 1.82 TB usedSystem type    64-bit operating system, x64-based processor Lightroom is very slow despite everything that I have researched on the web. An additional problem is that when I open an window within Lightroom, for example, the preferences window, Windows goes bezerk. The screen keeps flashing showing all the apps that are open and the only way that I can stop this from happening is to open Task Manager and quit Lightroom. Pressing ESC or the CTRL, ALT keys altenatively, eventually (3 minutes after the event) works.  Why is this happening? How can I stop this madness? Thank you so much! Jaime

johnrellis · Answer

As a first troubleshooting step, restart your computer. If the problem persists, try resetting LR's preferences:
https://www.lightroomqueen.com/articles-page/how-do-i-reset-lightrooms-preferences/

LR sometimes soils its preferences file, and resetting it can fix all sorts of wonky behavior. That article explains how to restore the old preferences if resetting doesn't help.

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