Foreign exchange fluctuations were Lenovo's biggest headache in the third-quarter, Wong Wai Ming, chief financial officer at the world's biggest PC maker, told CNBC.
Wong, who is a member of CNBC's Global CFO Council, said that other than the greenback, currencies were depreciating in both mature and emerging markets. This was a problem when earnings from outside the U.S. were reported in U.S. dollars, he said.
"Lenovo's top 10 countries already account for more than $40 million difference," Wong said.
The Chinese personal computer and phone-maker reported an 8 percent drop in third-quarter revenue to $12.9 billion, on slowing demand for computers and smartphones, even though net profit rose 18.5 percent to $300 million, beating forecasts.
The challenges included the "general economic environment, in particularly the foreign currency issue," Wong said.