I have recently bought a new Toshiba A500-1C0 laptop and it was having the operating system Windows 7 Home Premium. But I thought that installing the Windows 7 Ultimate will be a good choice so I removed the Windows 7 Home Premium and installed Windows 7 Ultimate. Everything is working fine in laptop except sound. Sound is coming, but with a cracking noise and the quality of the sound is not good. Therefore, can anybody help me with this Sound Problems A500-1C0 Static (cracking) issue.