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Please specify the exact version of your operating system and Lightroom application you are using.
Windows 10 64 bit, ver 20H2, Intel(R) Core(TM) i5-9400F CPU @ 2.90GHz, RAM 32,0 GB, LrC 10.4, Ps 22.5.0
1. Update your graphics driver by going directly to the manufacturer's web site and doing a clean uninstall/reinstall:
2. Try disabling the graphics processor by setting Preferences > Performance > Use Graphics Processor to Off. (This probably won't help but it's trivial to try.)
3. Set Windows display scaling to 100%. Then in LR, set Preferences > Interface > Font Size to Automatic. LR has lots of problems on Windows when display scaling or the font size are other than 100%.
4. Try resetting LR's 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.
I tried to set display scaling to 100 % and it´s worked, the windows are now right and I haven´t any overlaps.
Glad you discovered the cause. It's unfortunate that, after all these years, LR still doesn't work correctly with display scaling.