FixYa is a troubleshooting site with more than 25 million monthly visitors. For its , the company gathered the most common complaints and questions about the laptops from its members.

The MacBook Air has unique problems, probably because it isn't technically an Ultrabook. Common MacBook Air issues include low memory (25 percent of reported issues) and thermal shutdown (25 percent), which is when the computer shuts down if it gets too hot. Owners also complained that the MacBook Air is difficult to repair and has poor speaker quality. About 15 percent of users had "other" issues.

The MacBook Air's memory can't be upgraded, but for the thermal shutdowns and overheating, FixYa recommends taking steps like making sure the vents aren't covered and turning down the screen brightness.

According to the study, the most common Ultrabook problems included poor battery life, poor screen quality, and slow performance, though the issues vary by device.

Almost half--45 percent--of Asus Zenbook Prime users reported touchpad errors. This, however, may only be for older versions of the Zenbook, since Asus upgraded the newer UX31A's touchpad. ( of the Asus Zenbook Prime UX31A found the overall touch experience to be better.) Zenbook owners also say the laptop has keyboard issues, runs slowly, and has heat and noise problems.