"The new Lenovo is already showing signs of achieving its potential, although we have much yet to do," Chief Financial Officer Mary Ma said in a statement.
"Most importantly, the response of our customers has been very positive as they begin to see evidence of the complementary strengths of the two organisations."
After initially reacting with scepticism, investors have gradually warmed to Lenovo's $1.25 billion purchase of IBM's PC assets in April, making it the world's third largest personal computer maker.
Lenovo outlined a broad restructuring in late September, as it attempts to integrate its own China-focused business with the vast global business of its new IBM assets.
Lenovo earned a profit of HK$354 million (US $45.4 million) for the three months through September, compared with HK$290 million in the same period a year earlier, based on Reuters calculations.
That beat the average forecast of HK$344 million for the three-month period, according to the average of five analysts polled by Reuters.
UOB Kay Hian analyst Mark Po also noted that margins were below his expectations, based on preliminary calculations.
The company confirmed after the market closed that gross profit margin for its fiscal second quarter through September stood up 14.0 percent, up 2 percentage points from a year earlier but down sequentially from the fiscal first quarter.
China is now the world's second-biggest PC market, with 15.8 million units shipped last year and the market is expected to grow more than 14 percent this year and next, according to International Data Corp.
Lenovo now controls about a third of the market, but has come under attack there from international giants Dell and Hewlett-Packard in the last few years, as well as Taiwan's Acer Inc more recently.