Can't remove AVG Antivirus, use one of the AVG tools from the AVg Website to remove. AVG Tool to Remove
DVD / CD sound jittery or broken up - Check DMA settings on IDE port used by CD, Dell have a small utility to reset the DMA settings I have used on a Compaq Precarious R3000link to Dell Download Area or search on Dell for PIOtoDMA.exe.
Always ensure that your virus checker, firewalls and spyware are kept up to date. Ensure that the latest Microsoft security patches are installed.
* These links are for your reference, make sure you are happy with any software prior to download.