I am troubleshooting problems with my friends ASUS x541U, it has battery and windows update issues. From asus website there are two X541U models the A and the AK. On the back of the laptop it says it is X541UA model and the serial number also confirms this. However the BIOS on the laptop is for the X541UAK model. BIOS versions X541UAK 206 I cannot find out what the difference is between these models, and if this BIOS could be causing the issues. There are new BIOS updates for both the UA and UAK models. Should i change the BIOS to the UA version or update it to the newer UAK version? Thanks for any help