Hello,

Please try the following and let me know:

1 Uninstall the display driver and restart computer.
2 When it starts again, use the following steps to disable startup items:

Click windows icon
Type msconfig in the Search bar and press Enter
Click on the Startup tab
Click Disable All
Click Services tab
Click on the checkbox Hide all Microsoft services
Click Disable All
Click Apply and Close

Restart the computer.

When it starts again, reinstall the driver for graphics card.

Restart once more.

Let me know the results


Thanks

Interesting problem. I haven't worked with World of Warcraft much. However, if all else is inobvious, it can help with an intermittent failure problem, to do a general scan for adware / spyware / malware / viruses. I can recommend these utilities, all free of charges, with no costs, and without drawbacks:

1. Go to www.spybot.com, download Spybot Search & Destroy 1.6, install it, update it fully, run a complete scan, and tell it to Fix whatever it finds wrong.

2. Go to
http://us.trendmicro.com/us/products/personal/CWShredder/
and download by clicking the icon to ""Remove CoolWebSearch" (saving it to e.g. the Desktop, where it will be easy to find). Run CWShredder by double-clicking on its paper-shredder icon, agree to the license, click Scan Only, watch as the results scroll up... if all entries say "Not present", then nothing of the sort is present... but if one IS found, choose Fix on this scan or the next scan (if the next scan, start the scan with the Fix button instead of the Scan Only button.)

3. Go to
http://vil.nai.com/vil/stinger/
and download Stinger at the link next to the number 1. , below the question "How do I use Stinger?" Save to a location where it will be easy to find its orange and yellow square icon:

and double-click on it to start it. Configure it in its Properties to scan boot sectors (as well as all the other things), select scan area (probably just C:\ would do), and start scan. It may find nothing, but if it finds anything, that's cause for concern.


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Try setting Graphics Acceleration lower...
The first thing to do is to look in your
Start - Control Panel - Display - Settings tab - Advanced button, ... Adapter tab (report to me as to what Adapter maker & model is listed there) ...or the Monitor tab (report to me what Refresh Rate (in Hz) is set there and what values it can be changed to)... or the Troubleshoot tab, and try changing the slider to a setting farther to the left or all the way to the left then OK and OK to save the changed setting (and see whether it helps)... this last is most likely to help of any one thing you can change.
Try changing setting and also report back to me what data you find, please.