External sound card to help reducing CPU stress? Options

[Katatsumuri]

Hello. Hope to find an answer to this little problem of mine.
I sometimes run Ableton Live 8.2 on a Samsung laptop (windows 8 64bit). When playing above around 10 tracks with effects ecc (without "freezing" them) the CPU load indicator tends to go over 100% and everything is messed up. The bottleneck of this computer is clearly the CPU: it's and AMD A6 4455 "trinity"(dual core). It's clearly not a great processor but it's still brand new and I thought it could handle some more stress by Ableton.
Now, my question is:

Would an external sound card help taking off some CPU stress when processing audio? (Maybe dedicated drivers instead of Asio4all might help?)

In that case, what kind of external sound card should I buy? (I'd like to buy one anyways)

Thank you in advance.

PS: sorry about my goofy english!

[Katatsumuri]

A "glitch" in the audio would be normal if you overload your CUP/data bus, but a well-written application should never freeze or crash.

Well, Live is not crashing. It simply glitches continuously making it impossible to work. Freezing tracks really helps keeping everything under control but, still, the CPU usage indicator goes around 80% (no more glitches but not so "safe")
When I work on the same projects on my desktop computer the CPU usage indicator has much lower values.