Go to Control Panel, System, Device Manager ... look under audio ... how many sound cards do you see? My Toshiba, for some unknown reason, had 2 sound card drivers. I disabled one, and now it plays OK. I don't say "fine" because my laptop is a piece of junk ... but it works. I just use it when I am travelling.
In Sonar, change whatever device interface you have to something else, and at some point the WaveProfiler will pop up and run, test your soundcard, and make the appropriate settings. I used to use a SoundBlaster and I got it to work. It actually had a nice little synth on it.
In conclusion, as far as frustration goes ... do you ever stop to think how complicated the software must be to function as a DAW? Blows my mind that any of them even work at all! So if you run into a glitch, you should expect a glitch. You are on a STEEP learning curve - the Sonar Platinum manual is over 2000 pages. Its like when you start learning to play guitar, all frustration and bleeding fingers ... but once you get over the hump, its still all frustration and bleeding fingers. Nothing in life worth doing well is easy. And nothing in music is ever easy.