Sorry that you're facing performance issue with Lightroom Classic CC. To begin with, please check that the app is updated to latest version 7.2, see Keep your Lightroom version up to date
We have compiled a list of issues reported related to performance after the update, Issues after updating to Lightroom Classic CC 7.2 Please check the article and check if that improves the performance.
If not so, does the issue persists if you un-check "Use graphics processor" under Preference> Performance in Lightroom?
Please take a look at this article Troubleshoot Adobe Lightroom problems, issues, or bugs and let us know if that helps.
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Are you running any antivirus software on the windows machine? I am starting to believe that the No 1 cause of slowness in Classic is overactive antivirus/malware detection software that constantly scans the Lightroom catalog every time you make any change to it. You can fix this by excluding the catalog and preview databases from the scanner. Also make sure Lightroom Classic is completely updated.
Hi, I am only running standard win10 antivirus on the machine. I have excluded the folders so lets see if it is going to help! Thanks
I have unchecked the box but I don't notice any performance improvement. I am using the cloud installations so always up to date :-)