Some things to try…
Turn off use of the graphics processor in preferences -> performance. If that makes a difference you may need to update graphics drivers or get the intel driver package rather than the lenovo one.
You could try clearing your lightroom preview cache. Means you will need to rebuild any previews for collections you are working on.
You could also try a new catalogue. Make a backup of your lightroom catalogue from within the program. Then rename your main catalogue to something with a different file name and extention (will currently be lrcat).FInally copy your newly created backup to your catalogue location and open lightroom from that file. Might be enough, or you may have to make a brand new catalogue and then follow the process to merge your existing one.
Messing with catalogues is scary stuff. Back it up multiple times before touching it!!!