Windows 7 has lost its market share for the first time since its release. Windows 8 gained 0.58 percentage, from 1.78 percent to 2.36 percent. Whereas Windows 7 lost 0.63 percentage, from 45.11 percent to 44.48 percent according to data provides by Net Applications.
Windows 8 grew 0.66 percentage of market share in December, meaning January's gains were smaller.
Good news is that Windows XP is losing it's market share with a steady rate. Windows XP was installed in 39.82 percent of PCs worldwide in December 2012. It's now on installed 39.51 percent of PCs.