Screen Flicker When Using Slide Bars in Develop Module

Image below shows 6 core usage during edit of an image using LR 4.2RC. Image import was running in the background. This only occurs when I use the develop module sliders (it doesn't matter which slider).

At this point, I think I will have to go back to LR 3.x. Lightroom 4 is so unstable that I cannot get it to work. I constantly get not responding messages and screen flickering in the develop module.
I have done everything I can find and nothing seems to work. It is either an incompatibility with the AMD video drivers (best guess) or there is something seriously wrong with the code (second guess), however LR 3.2 does not have this issue.
Lightroom version: 4.2 RC [844780]
Operating system: Windows 7 Home Premium Edition
Version: 6.1 [7601]
Application architecture: x64
System architecture: x64
Physical processor count: 6
Processor speed: 2.8 GHz
Built-in memory: 16381.5 MB
Real memory available to Lightroom: 16381.5 MB
Real memory used by Lightroom: 603.5 MB (3.6%)
Virtual memory used by Lightroom: 621.6 MB
Memory cache size: 191.8 MB
System DPI setting: 96 DPI
Desktop composition enabled: Yes
Displays: 1) 1920x1080, 2) 1280x1024

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Screen Flicker when using Lightroom

I'm helping a friend try to resolve a problem he has when using Lightroom. He's using a Dell Inspiron 546 desktop with an AMD Athlon II X2 250 (3.0GHz, 2MB cache), 4 GB DDR2 SDRAM (800MHz), ATI Radeon HD 4350 (512mb), 7200RPM drive, Windows 7 Home Premium (64bit).
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At this point, I think I will have to go back to LR 3.x. Lightroom 4 is so unstable that I cannot get it to work. I constantly get not responding messages and screen flickering in the develop module.
I have done everything I can find and nothing seems to work. It is either an incompatibility with the AMD video drivers (best guess) or there is something seriously wrong with the code (second guess), however LR 3.2 does not have this issue.
Lightroom version: 4.2 RC [844780]
Operating system: Windows 7 Home Premium Edition
Version: 6.1 [7601]
Application architecture: x64
System architecture: x64
Physical processor count: 6
Processor speed: 2.8 GHz
Built-in memory: 16381.5 MB
Real memory available to Lightroom: 16381.5 MB
Real memory used by Lightroom: 603.5 MB (3.6%)
Virtual memory used by Lightroom: 621.6 MB
Memory cache size: 191.8 MB
System DPI setting: 96 DPI
Desktop composition enabled: Yes
Displays: 1) 1920x1080, 2) 1280x1024

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Hello rmj49,
Welcome to the HP Forums!
I understand the computer display flickers when using the AMD driver. The issue is probably related to hardware, but there are a couple things I would like you to try fist:
First, please uninstall and reinstall the AMD Driver according to these steps:
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If nothing works, I would contact HP phone support to address the actual AMD card itself. You can utilize this website to learn how to contact HP appropriately, based on your region: Contact HP Worldwide
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I would like to know how can I show only the tables that I created under the Tables tree? Your posting is not clear,again tell something more on tables tree,what u want to achieve with it.
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Screen Flicker When Using Slide Bars in Develop Module

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