Hi Mokonafan,
I've recorded many different live instruments over the years and while Lyle's suggestion to check your playback channels for added effects should be done, the simple truth of the matter is that laptop microphones are designed to pickup voice. They just don't have the frequency range required to properly record live instruments, especially something like a piano, which can go down to 27Hz with the low A.
To properly record an acoustic piano, I'd recommend a pair of omni-directional microphones, positioned in such a way as to capture sound equally from the low frequency notes of the piano, to the high frequency notes of the piano. The better quality microphone you buy, the better quality recording you can make.
You can get started with a pair of
SP-C4 mics, or if you have a little larger budget, a pair of
Avenson Audio STO-2 mics, with a full frequency range of 20-20,000hz, is a better choice.
The reality of recording live instruments is that no matter how good an instrument is, if you don't have a microphone capable of picking up the frequencies it generates, your results are not going to be as good as they could be. On the flip side, a small upright piano is not going to sound as good as a Steinway grand, no matter how good your mics are or how much studio magic you apply. For best results, you need both high quality instruments and high quality mics.
If you have an electronic keyboard with a midi port, another approach to getting a good acoustic piano sound is to simply record directly from a sampled piano sound module, which has always been the approach I use. In this case, the high quality recording of a high quality instrument, has been done for you and placed inside the sound module, in the form of samples. You can pick up a used piano sound module on ebay, with high quality samples, for around $200. I bought a Roland sound module on there for $150 a couple of years ago. It works well and has several really good piano patches to choose from.