Asdide from telling us Lr is "freezing", you've provided no useful troubleshooting information.
Lr version (Presumably CC, but guessing helps nobody)?
Is this a new problem?
How are you moving the files (upload to computer then import? import straight from camera? Cable to computer? card reader?)
I am on WIndows 8 downloaded via Creative Cloud. I get no error message. It just "thinks" for a long time and then when I click anywhere, the screen grey's out and it says "Not Responding". All other programs work fine. I can close out of Lightroom. I was in the middle of processing a weeks worth of Pictures from Disneyland. We returned home 8 days ago. I was able to use it fine for 2 days. The third day when I came home from work to start working the next batch of pictures, the problem began.
Because of the quantity of pictures I was taking on the Disneyland trip, I transferred them nightly to my hard drive. I was importing them into LR directly from my hard drive. I have done that in the past with no problems and I have import from my Lumix FZ200 via cable with no problems in the past as well.
Hope this helps.
OS Name Microsoft Windows 8.1 Version 6.3.9600 Build 9600 Other OS Description Not Available OS Manufacturer Microsoft Corporation System Name HOME System Manufacturer TOSHIBA System Model Satellite L50D-A System Type x64-based PC System SKU PSKMAU Processor AMD A8-5545M APU with Radeon(tm) HD Graphics, 1700 Mhz, 4 Core(s), 4 Logical Processor(s) BIOS Version/Date INSYDE 1.30, 9/2/2013 SMBIOS Version 2.7 Embedded Controller Version 1.40 BIOS Mode UEFI BaseBoard Manufacturer TOSHIBA BaseBoard Model Not Available BaseBoard Name Base Board Platform Role Mobile Secure Boot State On PCR7 Configuration Binding Not Possible Windows Directory C:\Windows System Directory C:\Windows\system32 Boot Device \Device\HarddiskVolume2 Locale United States Hardware Abstraction Layer Version = "6.3.9600.17196" User Name Home\HOME\Marc Time Zone Pacific Daylight Time Installed Physical Memory (RAM) 8.00 GB Total Physical Memory 7.20 GB Available Physical Memory 4.76 GB Total Virtual Memory 8.33 GB Available Virtual Memory 5.41 GB Page File Space 1.13 GB Page File C:\pagefile.sys Hyper-V - VM Monitor Mode Extensions Yes Hyper-V - Second Level Address Translation Extensions Yes Hyper-V - Virtualization Enabled in Firmware Yes Hyper-V - Data Execution Protection Yes
Lightroom version: CC 2015.1 [ 1025654 ]
License: Creative Cloud
Operating system: Windows 8.1 Home Premium Edition
Version: 6.3 
Application architecture: x64
System architecture: x64
Logical processor count: 4
Processor speed: 1.6 GHz
Built-in memory: 7374.2 MB
Real memory available to Lightroom: 7374.2 MB
Real memory used by Lightroom: 370.0 MB (5.0%)
Virtual memory used by Lightroom: 325.9 MB
Memory cache size: 68.0 MB
Maximum thread count used by Camera Raw: 4
Camera Raw SIMD optimization: SSE2,AVX
System DPI setting: 96 DPI
Desktop composition enabled: Yes
Displays: 1) 1366x768
Input types: Multitouch: No, Integrated touch: No, Integrated pen: No, External touch: No, External pen: No, Keyboard: No
Graphics Processor Info:
Check OpenGL support: Failed
Vendor: ATI Technologies Inc.
Version: 3.3.12422 Core Profile Context 184.108.40.206
Renderer: AMD Radeon HD 8510G
GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS (actual = 32, minimum = 48)
Application folder: C:\Program Files\Adobe\Adobe Lightroom
Library Path: C:\Users\Marc\Pictures\Lightroom\Lightroom Catalog.lrcat
Settings Folder: C:\Users\Marc\AppData\Roaming\Adobe\Lightroom
2) Canon Tether Plugin
5) Leica Tether Plugin
6) Nikon Tether Plugin
Config.lua flags: None
Adapter #1: Vendor : 1002
Device : 9999
Subsystem : fa161179
Revision : 0
Video Memory : 735
Adapter #2: Vendor : 1414
Device : 8c
Subsystem : 0