I boot my PC. CPU load is minimum (~5%). I open start10 and enter any search - explorer.exe starts consuming 25% of cpu. If I close search and go back to desktop and then input something into search bar - another 25% is added to CPU usage. If I do this 4 times, my cpu usage is 100%.
If I use ctrl+windows key to open standard Microsoft start menu and search using this - explorer.exe is fine. It jumps for a second and then it is quiet.
Only remedy for start10 cpu usage is to wait few minutes or restart explorer.exe - usage drops back to minimum fast.
I am using windows 10 1809 with latest updates and start 10 v1.71.
This problem appeared recently (I noticed it yesterday but I wasn't using my pc too much for last few days). I tried uninstalling all updates from last few days until I've reached update kb4509095 which is impossible to uninstall. It is called "Servicing stack update" so maybe it broke something with search. I tried to reinstall start 10. It said something about rebuilding control panel index, I clicked "yes" and nothing happened, so I do not know if program rebuilt that.
It is really annoying issue because it is making my ultrabook really loud and power-consuming (all 4 cores jump to max boost, fan starts spinning like crazy etc).
My opinion - something is wrong with search implementation after windows updates. Like it does not stop after I close menu or something? And if I open menu again it starts another search instead of terminating previous one?
I am of course searching only locally with cortana search disabled.