Since upgrading to Windows 10 I am not able to create a new catalog with Lightroom. I am able to use previously created catalogs, add images, modify and export. I can't create new ones. When I attempt to create a new catalog the software engages the dialog and takes me up to the point where I click "create." After that the software closes and I expect it to restart, but it does not.
What is the path where you try to put the new catalog?
Do you have full access (read/write) privileges there?
As stated above it is more than likely a permissions problem. Win 10 has gotten more restrictive on where you can save file to by default. So check the folder you are trying to use to store the catalog file. Make sure your UserName has Full control in the security tab of the folders properties.