Admin and Frontend icon fonts missing after installing Magento2.O
1. Open file app/etc/di.xml in and editor
2. find the line MagentoFrameworkAppViewAssetMaterializationStrategySymlink
and replace it with MagentoFrameworkAppViewAssetMaterializationStrategyCopy line.
3. Go to folder pub/static and remove all files and folders except .htacess file.
4. Remove var/cache,var/composer_home,var/generation,var/page_cache,var/view_preprocessed
5. Refresh the URL , hope it will solve the problem.