ThinkPad T510 type 4313 Windows 7 64 bit- sound in and out

Hi,
I bought my ThinkPad T510 in March 2011, had purchased a 1 year warranty, which has expired. My sound issue started almost 2 months ago. While watching DVD's, videos online at any site from yahoo, facebook, youtube, netflix, hulu etc my sound will stop completely while the video still runs. I have to press the volume buttons on the keyboard either up or down to turn the sound back on temporarily. The sound may come back on for 15 minutes or 5 seconds. Sometimes the volume buttons are not effective and then I have to click on the speaker button in the bottom right hand side of the screen to manually slide the volume button up or down.
It seems like such a small problem with an easy fix, but it is extremely frustrating when watching for example, a 30 second video and having to hover over the volume button.
I've tried everything.
- Called Lenovo for support or direction for this quick fix that should be available (I can't be the only one with this issue, because I've never had this problem before). This issue isn't familiar, I can ship it in, and possibly pay up to $600 for them to locate and fix the issue.
- Updating the Conexant drivers
- Removing current driver and having it auto reinstall most up to date driver
- trying the diagnose & fix app on here which found nothing wrong
- Ran my Norton virus check
- removed all cookies and history
- Updated the conexant drivers from the Lenovo Support tab
- Used monthly Norton phone support 3 different times to diagnose and fix the issue
I am at a loss, please help.
I've been told it could be a hardware issue or the VOIP may need to be turned off. Norton cannot touch "the brain"over the phone

Hey Soundless,
Have you updated your BIOS to 1.52?
Try to find older audio driver versions and see if it works.
Also, check in Device Manager under your audio devices and make sure that you don't have any audio drivers conflicting with each other.
Be AWESOME Everyday!
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Additional Information 2: ad011ba5f87a70fa4fcf99fe53ccc471
Additional Information 3: 184a
Additional Information 4: 5b6bac566010931808e4f5f3b58e54e6
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Problem Event Name: APPCRASH
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Application Version: 8.0.6001.18999
Application Timestamp: 4ccf9787
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Fault Module Version: 8.0.6001.18999
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Fault Module Timestamp: 4c87d2a0
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Exception Offset: 0003c759
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Locale ID: 1033
Additional Information 1: fd00
Additional Information 2: ea6f5fe8924aaa756324d57f87834160
Additional Information 3: fd00
Additional Information 4: ea6f5fe8924aaa756324d57f87834160
Problem signature
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Application Name: iTunes.exe
Application Version: 10.1.0.56
Application Timestamp: 4ce4a7b6
Fault Module Name: QuickTimeCapture.qtx
Fault Module Version: 7.68.75.0
Fault Module Timestamp: 4c87d2a0
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Exception Offset: 0003c759
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Locale ID: 1033
Additional Information 1: fd00
Additional Information 2: ea6f5fe8924aaa756324d57f87834160
Additional Information 3: fd00
Additional Information 4: ea6f5fe8924aaa756324d57f87834160
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Application Timestamp: 4c87ca48
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Fault Module Version: 7.68.75.0
Fault Module Timestamp: 4c87ca3f
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Additional Information 1: ce18
Additional Information 2: 51a1821df37b716a5bcc7d3a608fd9cc
Additional Information 3: a5e1
Additional Information 4: c197509b4c5823cbbe47ce2e6aea41fd
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Bucket ID: 1370383568

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* https://support.mozilla.com/kb/Back+and+forward+or+other+toolbar+items+are+missing

ThinkPad T510 type 4313 Windows 7 64 bit- sound in and out

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