This doesn't sound like a LR problem, more down to system configuration.
It might be worth checking where LR is looking when trying to import files from. I had brief problems when LR defaulted at looking at a network cloud drive when the import dialogue was opened. With 30gb of files to check for something to import over a slow IP connection it gave the appearance that LR had frozen.
Also;
If you want answers to problems like this you'll need to supply a lot more detail for people to be able to help. eg OS, version, system config etc....
Sure, this is Windows XP SP2 running on a dual core 3 GHz processor w. 4Gb RAM. I keep the system as clean and streamlined as I can.
It's not a cloud issue, as LR is only looking at physically attached drives, and in any case it's not "the appearance" of LR freezing, it's my entire system that is frozen. It's a complete Windows crash. No programs respond, I cannot even open Task Manager to view or terminate processes. The Start button will not respond to allow me to shut the computer down. This does sort of strike me as a LR problem as none of my other programs do anything remotely similar and this event happens only in LR and as soon as I click "import photos." It does not open the import dialog, the import process does not begin to run and then loop. I click "import" and my entire system crashes. I can't pin it down to what else might be running as it sometimes happens on a reboot with nothing else open. And sometimes I reboot, open LR and can import ok, and sometimes it does it again.
My main hope was that this issue was known to someone who could say, "oh yes, that's known, it's caused by X and you need to do Y," rather than the generic "uninstall everything and reinstall," which of course it may well come to.
Any more thoughts?
Thanks.
Rob P