During Patch Tuesday for the month of March 2013, Microsoft also released a cumulative update (firmware update) for both the Surface RT as well as the Surface Pro, addressing some issues that have been plaguing Surface owners for a while now.
For the Surface RT, the March cumulative update fixes WiFi reliability and allows for better roaming and improvements to the Limited connectivity scenario. The update also fixes issues with the integrated volume button as well as provides an improved experience with the Touch/Type cover (especially when the device and keyboard are lying flat or on soft surfaces). The update also resolves issues with random muting and offers Trackpad performance improvements.
For the Surface Pro, the March 2013 cumulative update fixes WiFi reliability and allows for better roaming and improvements to the Limited connectivity scenario. The Windows to Go feature is now enabled as well. On top of that, the update provides improved onscreen keyboard detection synchronization when going in and out of sleep.
Head over to Windows Update to snag these updates. Simply go to the Start Screen and begin typing "Windows Update."