Try using an external speaker or headset. If the the scratchy issue does not happen again then its your internal speaker. If the issue persist, try uninstalling and reinstalling your Audio Driver. Make sure that you have the disc that came with your computer for reinstallation of the audio driver.
If you have Windows XP:
[Control Panel > Add/Remove Programs] to see if there is a dedicated removal program and if so use it.
More likely you'll have to go to [Control Panel > System >
Hardware > Device Manager > Sound, video and game controllers >
(Your sound card) > Driver > Uninstall], a reboot will almost
certainly be required.
If you are using Windows Vista or Windows 7 follow this:
1. Open the
Control Panel (Classic View).
2. Click on the
Device Manager icon.
3. Click on
Continue in the UAC prompt.
4. Click on the
+ sign next to the device you want to uninstall to expand it. (See screenshot below step 5)
5. Right click on the listed device and click on
Properties.
NOTE: You can also click on Uninstall and go to step 8 instead.
6. Click on the
Driver tab. (See screenshot below step 7)
7. Click on the
Uninstall button.
8. To Uninstall Only the Device - NOTE: This will only uninstall the device and leave the device driver still installed for the device.A) Uncheck the
Delete the driver software for this device box. (See screenshot below step 9)
NOTE: If you do not have this option, then only the device will be uninstalled. Go to step 10.
B) Click on
OK.
NOTE: Sometimes, you may be prompted to restart the computer to finish uninstalling the driver. If you do, then click on Yes to restart the computer.
B) Go to step 10.
9. To Uninstall the Device and Device Driver - NOTE: This will uninstall both the device and device driver software installed for the device. A) Check the
Delete the driver software for this device box.
NOTE: If you do not have this option, then only the device will be uninstalled. Go to step 10.
B) Click on
OK.
NOTE: Sometimes, you may be prompted to restart the computer to finish uninstalling the driver. If you do, then click on Yes to restart the computer.
10. Device Manager will now no longer have the device listed. (See screenshot below)
11. Close Device Manager. (See screenshot below step 5)
Restart your computer. Once the computer restarts, it will automatically detect your hardware. Or you can manually install the driver that came with your computer
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