Sounds lagging all the time

I dont know how to describe this problem but whenever im running a music program such as itunes/winamp in full screen mod and i scroll in any program the music lags.

I dont think its associated with the scrolling but it just makes it play up.

Also this problem comes and goes.

Ive tried cleaning the inside of the box and and stuff but i have no idea what it could be

• Go to Piriform's website, and click the big button. Next, click Download from Piriform.com (the FileHippo link requires an extra click). Or if you want to use a portable version of Speccy (which doesn't require installation), click the builds page link and download the portable version. You will now be asked where you want to save the file. The best place to put it is the Desktop, as it will be easy to find later.
  
• After the file finishes downloading, you are ready to run Speccy. If you downloaded the installer, simply double-click on it and follow the prompts until installation is complete. If you downloaded the portable version, you will need to unzip it before use. Right-click the ZIP file and click Extract all. Click Next. Open up the extracted folder and double-click on Speccy.
  
• Once inside Speccy, it will look similar to this (with your computer's specifications, of course):

Now, at the top, click File > Publish Snapshot You will see the following prompt:



Click Yes , then Copy to Clipboard



Now, right-click on any empty space in your reply box and click Paste.

You have just posted your specs!
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http://speccy.piriform.com/results/BV1DDbFOdFxpSpgvAiB1Lz7

Your specs look very good
Try to reinstall sound driver.