As I was performing testing on the Acer Iconia W4, I noticed that when I was using my Microsoft Sculpt Bluetooth Mouse with it, it was jittering and jumping and unusable every now and then. I thought it was a mouse compatibility and was about to run further test when people on the forums also mentioned that there were problems, and it seems like it was related to the WiFi card, since turning off WiFi solves the jumpiness issue. Why of course that is not an appropriate fix, so I decided to poke around.
If you're not in the reading mood, you can check out the video for the fix here.
So first we need to get into device manager, and here are the steps in case you're unfamiliar with it. First you need to go to the desktop, call out the charms bar and hit settings. Then you click on PC Info in the flyout.
This will bring up the System Information window, in which you want to click on the Device Manager link.
This will bring up the Device Manager which shows you a list of all hardware in your PC, expand the item called Network Adapters, then Right Click (or tap and hold if you're not using a mouse) on the device called Broadcom 802.11abgn Wireless SDIO Adapter, and then select the Properties menu item.
This will bring up the properties dialog for the adapter.
What you want to do is click on the Advanced tab, then find the Bluetooth Collaboration item, now in the Value drop down it'll say either Auto or Enabled which is not what you want,
click on the drop down and choose Disabled from the list.
UPDATE 29th December 2013 : Setting the value to Disabled seems to have some performance issues with high bandwidth Bluetooth usage, like joysticks and speakers. I'm currently using the AUTO setting instead and it seems to be giving more positive results.
Then remember to press the OK button to save the changes.
You should see an IMMEDIATE improvement to your mouse performance.
I do not know if this will break anything, but so far both Bluetooth and Wireless seem to be functioning perfectly fine for me without any further hiccups.