Hi there, Not a computer expert by any means and would really appreciate your help. I tried to download a 'DVD decoder' that would enable me to watch a DVD that wasn't working on Windows Media the other day. This still didn't work and gave me a far more frustrating problem as well.... The sound has now gone and I have a yellow explanation mark next to my audio device (in device manager) and the device status says 'This device can not start (Code 10)'. My computer is as follows: Microsoft Windows XP Professional, Version 2002, Service Pack 3 Model: T7870 AMD Athlon(tm) 64X2 Dual Core Processor 4200+ 2.20 GHZ 1.00 GB of RAM I have tried de-installing and re-installing, got rid of any new downloads, checked for Viruses (using Kapersky), checked the wires and done everything on Windows Troubleshooter a number of times! I saw a few other threads on this and it all resulted in the poster having to buy a new sound card. Mine is built into my system and this all seems quite fiddly and could cause me to do further damage. Has anyone else got any further advice before I go ahead and do this? Thanks in advance for any advice given. It is much appreciated!