Thinkpad E540 with Windows 7 drops Wifi constantly

We just purchased 18 of these E540's and all of them are having the same issues in our network. They connect connect wirelessly but while doing a continuous ping I see a Request time out or a destination host unreachable every 8 or so pings.
I have used system update to update everything on the laptop, I have also done all the updates for Windows 7 and I have det the BIOS to original defaults.
I know there is talks of this "Lenovo EMC Storage Connector" causing issues with excessive traffic on windows 8.1 but we are dealing with Windows 7 64 bit and the process in question "discovery.exe: is not running nor present.
Any help would be very appreciated.
As a note I would like to point out that we have around 400 other wireless devices in our network at any given moment and we have not had any issues with any other prior Lenovo products. As a matther of fact we just deployed 60 Lenovo N20 Chromes last week without any issues.
Thanks

The only way we could make this work in our envirinment (and we have a big High school with well over 500 wireless devices that work without any issues), was to have Lenovo send us some different WiFi cards, They sent us the Broadcom BGN 1x1, BT4.0 cards

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The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc. The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored. ... GeezBlog
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The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc. The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored. ... GeezBlog
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Thinkpad E540 with Windows 7 drops Wifi constantly

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