Microsoft is releasing updates for the Surface Pro 4 and Surface Book. The software release includes a set of Microsoft and Intel driver but also tackles a "sleep" issue - the Surface Book would not always sleep, or when it went to sleep it would still consume significant energy. If you own the Surface Book or Surface Pro 4, it would be wise to install this update. According to Microsoft the update is being rolled out right now, so if you don't see it in your region just check back soon.

Here is what Microsoft has listed in the release notes for the update:

• System Hardware Update – 2/17/2016
• Microsoft driver update for Surface UEFI
• Microsoft driver update for Surface Management Engine
• Microsoft driver update for Surface System Aggregator Firmware

• Surface Management Engine update (v11.0.0.1202) improves system stability.
• Surface System Aggregator Firmware update (v103.1081.260.0) improves accuracy of battery status and battery life during sleep.
• Surface UEFI update (v104.1085.768.0) improves battery life and improves stability during power state transition changes into and out of sleep states.
• Intel Precise Touch Device driver update (v1.1.0.226) improves stability during power state transition changes into and out of sleep states.
• Intel HD Graphics 520 driver update (v20.19.15.4364) improves display stability, system stability and battery life.
• Intel Display Audio driver update (v8.20.0.745) supports compatibility with the updated graphics driver.
• Realtek High Definition Audio(SST) driver update (v6.0.1.7734) improves system stability.
• Intel Smart Sound Technology (Intel SST) Audio Controller driver update (v8.20.0.877) improves system stability.
• Intel Smart Sound Technology (Intel SST) OED driver update (v8.20.0.877) improves system stability.
• Intel Management Engine Interface driver update (v11.0.0.1176) improves system stability.
• Intel Serial IO GPIO Host Controller driver update (v30.63.1603.5) improves auto rotation reliability when tablet mode is turned off.
• Intel Serial IO I2C Host Controller driver update (v30.63.1603.5) improves auto rotation