YOSEMITE 10.10.1 ruined my WiFI on my iMac

There is no info on what is going on
Since the 10.10.1 update my wifi is diabolical on my IMAC internet freezes and pages take forever to load.
All my tablets and iPads/iphones work perfectly so there is no router or provider issues.
Running a loose Ethernet lead through the house works perfectly on the iMac too but long term this is not what i purchased an iMac for to have a cable through the house.
Also if someone falls over the cable can we blame apple??
Any solution would be appreciated.
I have reset the machine and also deleted all the preferred networks not required.
APPLE YOU SUCK at the moment. get a grip

Wi-FI connection drops
Wi-Fi Problems in OS X Yosemite
Wi-Fi Problems in OS X Yosemite (2)
Wireless Diagnostics
Also try turning off Bluetooth.
Troubleshooting Wi-Fi issues in OS X
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ThinkPads: S30, T43, X60t, X1, W700ds, IdeaPad Y710, IdeaCentre: A300, IdeaPad K1
Mark Hopkins
Program Manager, Lenovo Social Media (Services)
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Please read this whole message before doing anything.
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YOSEMITE 10.10.1 ruined my WiFI on my iMac

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