No Sound?

[baseballer10p]

Recently I've been having a problem with having no sound in my Windows 7 machine. My speakers work fine on other systems, and plugging in headphones in any port won't produce sound either. I haven't installed any new programs, - just Windows updates, which I have uninstalled through System Restore to no avail. I've attached a picture to show that the computer says it's producing sound, but still no sound comes out. I can't figure out what the problem is. Help please?

UPDATE:
I "system restored" even further back, and now I have sound. Here are the updates that Windows wants me to install now, so I'm guessing these are the problem. Has anyone had any trouble with these?

Definition Update for Windows Defender - KB915597 (Definition 1.113.126.0)

Update type: Important

Install this update to revise the definition files used to detect spyware and other potentially unwanted software. Once you have installed this item, it cannot be removed.




Security Update for Microsoft Visual C++ 2010 Redistributable Package (KB2467173)

Update type: Important

A security issue has been identified leading to MFC application vulnerability in DLL planting due to MFC not specifying the full path to system/localization DLLs. You can protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer.



Update for Microsoft .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008, Windows Server 2008 R2 for x64-based Systems (KB2468871)

Update type: Recommended

Install this update to resolve issues in Microsoft .NET Framework 4. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.



Update for Microsoft .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, Windows 7, Windows Server 2008, Windows Server 2008 R2 for x64-based Systems (KB2533523)

Update type: Recommended

This update addresses stability, reliability, and performance issues in Microsoft .NET Framework 4. After you install this item, you may have to restart your computer.

[jdeb]

Have you made sure nothing is muted out in the sound settings?

Does Device manager show any errors?

Have you tried to roll back the audio driver?

[Nuclear Krusader]

Create a restore point as of now and then install the updates one by one, to suss the offender out.

[baseballer10p]

Sorry for the late update, but I installed them one by one, and now I have no problem. Very strange. Thanks for the help!