Lightroom 5.7.1 on Windows 8.1 on an Intel NUC.
I have used Lightroom for at least 3 years and never had any issues. All of a sudden I cannot Import any images.
1. Start LR,
2. Click Import, wait, and wait, and after exactly 1 minute the Import dialog is displayed with a spinning wait cursor.
That's as far as it gets. I can't import, none of the controls is responsive and I cannot even close the import dialog. When I kill Lightroom using Task Manager it leaves the catalog locked and I need to restart the machine.
Other things that might be relevant:
1. If I unplug the Logitech Unifying Receiver USB device it kind of recovers and I can sort of use it, but it's very sluggish. Obviously I cannot use it without a keyboard and mouse so leaving it unplugged is not a solution.
2. The only other usb device is a tv tuner, but unlugging that makes no difference, and it used to work with the tv plugged in anyway.
3. On starting LR, if I try to do anything while the crystal splash screen is displayed, I SOMETIMES get a message saying 'waiting for server to respond' or similar. If I click Retry then it starts normally. The splash is displayed for about 30 seconds, which seems longer than I remember it being.
This is really problematic for me and I would appreciate any help. I am getting by using Capture One, but LR is still my preferred image library, if it can be made to work again.
Have you tried using a different USB port for your receiver?
Try creating a new catalog to see if that is the issue, it could be that your current catalog has become corrupt. when was the last time you optimised your catalog? goto file then optimise catalog.
The problem turned out to be a micro-sd to standard-sd card converter which I left in a usb slot. I had forgotten about it, and would have assumed that this was a 'passive' device anyway, but removing it fixed the problem.