Having trouble importing pictures to lightroom classic. Computer freezes.

Also, please post in a reply a screen capture of your Import Screen.

Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut out as that is just so much dead space to us non-Techs and it takes up vast amounts of scroll space making the reply less readable and less likely that others will bother with your post.

Without more information, it is only guessing.  My first would be that you disk is too full.