Click on the Start orb and type in services.msc, then Enter. Find Plug and Play, right click it, and choose start. Then find any thing related to Windows Media and start those too. Realtek is your speakers. Also, you may need to go to control panel > System Maintenance > Performance Information and Tools > Performance options, then click the "advanced" tab. Let Windows manage the page file size. You also sound like you need more memory.