Do you get the same when trying in Safe Mode with Networking ?
Also see if these cmds from an admin cmd prompt improve matters -
netsh winsock reset
ipconfig /flushdns
ipconfig /registerdns
shutdown /r /t 00
What do you get when you enter tracert 
www.tweaking.comWhile yours will be different from India, here's mine from the UK -
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.
C:\Windows\system32>tracert 
www.tweaking.comTracing route to tweaking.com [199.119.100.39]
over a maximum of 30 hops:
  1     1 ms     1 ms     2 ms  ROUTER [192.168.1.1]
  2    35 ms    31 ms    31 ms  81.1.112.37
  3    36 ms    33 ms    34 ms  host-78-151-224-3.as13285.net [78.151.224.3]
  4    34 ms    34 ms    33 ms  host-78-151-226-236.as13285.net [78.151.226.236]
  5    39 ms    40 ms    41 ms  host-78-144-9-73.as13285.net [78.144.9.73]
  6    40 ms    40 ms    41 ms  host-78-144-13-44.as13285.net [78.144.13.44]
  7     *       41 ms    42 ms  lag-103.ear2.London2.Level3.net [212.187.192.113]
  8   143 ms   146 ms   143 ms  ae-0-11.bar2.Tampa1.Level3.net [4.69.137.110]
  9   143 ms   143 ms   147 ms  HIVELOCITY.bar2.Tampa1.Level3.net [4.34.133.30]
 10     *        *        *     Request timed out.
 11   143 ms   143 ms   149 ms  server.pg01.com [199.119.100.39]
Trace complete.
C:\Windows\system32>