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Boot0ss error after installation of Yosemite 10.10.1 to the hard drive & no Wi-fy network icon

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I have Acer ES-571-33Ys laptop having Intel i3-4030U CPU (4th Generation) with Intel HD Graphics 4400.

I successfully installed Yosemite 10.10.1 (Niresh) in one of my hard drive partitions using bootflag /haswell -x -v ncpi=0x3000 from yosemite Zone.dmg USB. But when I completed the installation to the hard disk partition "Yosemite HD" and rebooted , it gave "boot0ss: error" in the start screen. I can only boot with the USB. How to solve the problem and dirctly boot from the hard drive without USB.

Also the 'Wi-Fi network' button is not activated while 'Local network (Ethernet)' and 'My computer does not connect to the Internet' buttons are activated. How can I connect Siti cable Broadband to Netgear wify  router in yosemite 10.10.1 (Niresh). The name of the wify router is "N150 Classic wireless Router, Model no.: WNR612". I cannot view any wify icon on the desktop.

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