先去设置禁用wifi，然后再启用，一般就好了，如果不行那就重新找个驱动装上

直接u盘重装系统

将“43430r0nvram.txt”和 "nvram.cmd" 拷贝到“c:\windows\system32\drivers\”目录，替换原来的文件，重启平板，检查是否WIFI已经正常工作
cmd脚本内容如下：
@echo of
cd %~dp0
echo Installing NVRAM for W8X hardware 2015-11-1
copy .\43430r0nvram.txt c:\windows\system32\drivers\ /
paus
exit
txt内容如下：
# NVRAM file for BCM943430WLSELG
# 2.4 GHz, 20 MHz BW mode
# The following parameter values are just placeholders, need to be updated.
manfid=0x2d0
prodid=0x0726
vendid=0x14e4
devid=0x43e2
boardtype=0x0726
boardrev=0x1101
boardnum=22
macaddr=00:90:4c:c5:12:38
sromrev=11
boardflags=0x00404201
xtalfreq=26000
nocrc=1
ag0=255
aa2g=1
ccode=CN/0
pa0itssit=0x20
extpagain2g=0
#PA parameters for 2.4GHz, measured at CHIP OUTPUT
pa2ga0=-168,7161,-820
AvVmid_c0=0x0,0xc8
cckpwroffset0=5
# PPR params
maxp2ga0=90
txpwrbckof=6
cckbw202gpo=0
legofdmbw202gpo=0x66111111
mcsbw202gpo=0x77711111
# OFDM IIR :
ofdmdigfilttype=18
ofdmdigfilttypebe=18
# PAPD mode:
papdmode=1
#papdvalidtest=3
il0macaddr=00:90:4c:c5:12:38
wl0id=0x431b
deadman_to=0xffffffff
# muxenab: 0x1 for UART enable, 0x2 for GPIOs, 0x8 for JTAG
muxenab=0x1
# CLDO PWM voltage settings - 0x4 - 1.1 volt
#cldo_pwm=0x4
#Out-of-band GPIO Wakeup
sd_gpout=0
sd_gpval=1
sd_gpdc=0