A sneeze (or sternutation) is a semi-autonomous, convulsive expulsion of air from the lungs, most commonly caused by foreign particles irritating the nasal mucosa. Sneezing can further be triggered through sudden exposure to bright light, a particularly full stomach, or as a result of unexpected, climatic variations in one's environment such as rapid changes in temperature and humidity levels.
Therefore, there may be multiple causes of sneezing and you can investigate the cause of sneezing in your case. You mentioned the use of a laptop being associated with this, therefore you may find some hint at the location where your laptop is placed.
You may also try some OTC antiallergics to help you.
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