LR 4.3 was working perfectly till today when I attempted to import some images. I successfully imported images yesterday but today when I click the Import button the screen goes gray and lightroom shows 'not responding'. I have rebooted, checked for updates, created a new empty catalog, checked that there are no video files in the source drive, placed all the image files to be imported into temporary folder on the hard drive to avoid problems with card readers, and still have the same issue.
Occasionally the import page does appear but the source column is empty. When I click the Source + the screen goes gray again and no activity appears other than the popup that asks if I want to close the program or wait.
The computer is running Win8, 12gbRAM, corei7/6 cores, plenty of drive space (4tb)
Arghhh
