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WIFI not working after Reinstall


This is first time I am reinstalling windows on my laptop (Insperon 14R 3421).
I installed windows 8 from the disc provided by the dell.  I downloaded all the suggested drivers as per my service tag from the dell site on 16 Aug 2014. After Reinstall all seems to be fine except for the wifi. I can connect to Internet via Ethernet.  I Installed follwing drivers in specified order.

1.Intel Chipset Driver : Chipset_Driver_K1WYP_WN_9.4.0.1026_A01
2.Intel Management Engine Interface Driver :Chipset_Driver_C4CP6_WN_9.5.14.1724_A02
3.Realtek Card Reader Driver :SD-Card_Driver_PTKWT_WN_6.2.9200.39052_A00
4.Intel Rapid Storage Technology Driver : Serial-ATA_Driver_52VGY_WN_12.8.0.1016_A01
5.Realtek High Definition (HD) Audio Driver : Audio_Driver_C1TYW_WN_6.0.1.7023_A00
6.nVIDIA Geforce GT 625M640M730M Graphics Driver : Video_Driver_3C02Y_WN_9.18.13.3165_A03
7.Intel HD Graphics Driver :Video_Driver_DKWTJ_WN_10.18.10.3277_A00
8.Realtek RTL8105E-VD Ethernet Controller Driver :Network_Driver_X2VXG_WN_8.19.726.2013_A00
9.Dell Inspiron 3421 System BIOS : 3421A12
10.Dell Wireless 1704 WiFi + Bluetooth Driver : Network_Driver_T20G2_WN_6.30.223.143_A00
11.Synaptics Touchpad Driver : Input_Driver_99MJR_WN_17.0.8.0_A00

please suggest if I missed any or are out of order. Attached is the screen shot of Device manager. I am presently residing in Thailand, and my laptop have valid 24 X 7 phone support now. Can you suggest me how can I use this facility in Thailand.  I called on the number provide on website it says Service Tag is Invalid although your website recognize it. Is this phone support only valid in India ?

Thanks in advance

Prabhat Kumar

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