Solution for Can't able to connect Google or Yahoo search

Google,Yahoo search engines not able to connect while other search engines working fine.?

Here is the solution:

The hosts file (C:\WINDOWS\system32\drivers\etc) was apparently altered by some sort of virus or spyware. The file contains numerous entries, including those that were blocked on the computer.

Remove all the entries from the file and all the sites were assessable (taking a backup first, of course).