HONG KONG (Reuters) - China's Lenovo Group Ltd, the world's biggest personal computer (PC) maker, said on Thursday its first-quarter net profit rose 64 percent, beating estimates as solid PC sales offset tepid smartphone demand.<div><a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=DrfoPbLA9kE:5fiVB8S5G38:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?d=yIl2AUoC8zA" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=DrfoPbLA9kE:5fiVB8S5G38:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=DrfoPbLA9kE:5fiVB8S5G38:V_sGLiPBpWU" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=DrfoPbLA9kE:5fiVB8S5G38:-BTjWOF_DHI"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=DrfoPbLA9kE:5fiVB8S5G38:-BTjWOF_DHI" border="0" /></a></div><img src="http://feeds.feedburner.com/~r/reuters/technologyNews/~4/DrfoPbLA9kE" height="1" width="1" alt="" />