virus and audio problems

i've got a few problems with my pc, first of my computer got a lot of trojans and the anti virus at the time didnt prevent it, and now their are about 100 virus or so give or take, and now the computer about every 5-10 minutes will take itself to a blue screen that says it is dumping the memory, then it acts like it just restarts and restores everything just like it was before it went to the blue screen. right now we cant afford to spend money on good antivirus program yet, any suggestions on the best possible torrent or program that works an is effective without payin for it

also someone has done something or removed something from the hard-drive for the sound, when i go into the control panel, sounds and control panel, and under the volume tab it says no audio device, and i'm not able to click on any of the buttons under that tab, i'm curious to ask if there is a way to retrieve that piece of missing data to fix this ,
my pc is running with windows xp,
for future responces thanks for tryin to help

 

Hi ravenman

First, we'll deal with the virus problem before fixing your audio one. I will suggest a free antivirus which is the best you can get. Tell me if you can do the following procedure without interruption, and if it cannot be done smoothly, then I will give you an alternative.

Download the program: Avira Antivir Free

Install Antivir, and then update it fully. If the integrated automatic update is too slow, then you can choose to download the update manually from this page: http://www.softpedia.com/get/Others...ra-Antivir-Virus-Definition-File-Update.shtml . Make sure to do another update via Antivir itself after you have manually updated.

Second, right click on the Antivir icon in your task bar, and click on Configure Antivir. Make sure Expert Mode is checked, and then expand Scan, and then click on Action for concerning files. Check Automatic, and set primary action to quarantine. Next, click on Heuristic, and check High detection level.

Third, boot into safe mode which you can do by repeatedly pressing the F8 key after you press the power button. Then, open Antivir and do a full scan of your computer. Wait until it is done, and then make sure you know where the scan log is. I will need it later. Now, restart your computer into normal mode.

Lastly, post the Antivir scan log here, and tell me if your problem still persists.

Best Regards