There are different factors that may cause connectivity issues.
First, we would like to mention that Intel does not support custom integration of wireless adapters:
If the adapter was installed from factory, it is always advised to contact the Computer Manufacturer Support for drivers and support.
In our best effort, here are a few recommendations that can help in this type of situation:
- Apply the configuration from the advisory: Wireless Networking — What are the Recommended Settings for 802.11n Connectivity?
- Disable the Bluetooth* component of the wireless adapter, as it may interfere with Wi-Fi signals.
- Set your wireless power plan to Maximum Performance. This is done by going to the Windows* Power Options - Change plan settings - Advanced power settings, and set the Wireless adapter to Maximum Performance, when plugged in and on battery.
This seems to have done the trick for me, taken from another thread while desperately seeking solutions. Many thanks to user Breen. I don't know if it's a permanent solution but I've gone more than a day with absolutely zero issues. I'll put it here just in case anyone else is searching for answers and stumbles across my post:
(i use Windows 8.1 64 Bit now, works also in Windows 8)
-First of all prevent Windows install new drivers automatically
-Right Click the windows icon Left Bottom Corner of the screen
-Click Device Manager
-Expand "System Devices"
-Right Click "Intel(R) Management Engine Interface"
-Click Uninstall (Also tick the "uninstall software for this device")
> Note: if you try to disable this, Intel will reactivate it - it's almost sinister how Intel will not allow it to be muzzled, it must be killed. Go ahead and try for yourself to just disable it first.
-On device manager buttons, press "scan for hardware changes"
-It finds but cannot install driver, marked the device with yellow mark
-Right click this device and disable it
Thats all. I think anyone having problem with wi-fi and smoothness of system, should try this.
BEFORE THIS PROCEDURE:
-Weak wi-fi signal
-Frequent connection drops
-Some performance issues
AFTER THIS PROCEDURE:
-Wi-fi signal is %100 (for same wi-fi configuration in my home)
-No connection drop
-Better boot-up and shut-down times
-When SLI enabled, game to desktop switch was slow (Alt+Tab) , now it is faster (still not fast as one GPU mode)
-Mouse was laggy a little, now it is ok
Note: the post on Lenovo site mentions using an older Inder Driver, I'm using a new one driver release 126.96.36.199.
Windows 8.1 with Lenovo P500 updated bios to V1.21