<s>
Hao123	B-Application
is	O
a	O
Chinese	O
online	O
listings	O
portal	O
by	O
Baidu	B-Application
.	O
</s>
<s>
Hao123	B-Application
has	O
been	O
accused	O
of	O
being	O
a	O
malicious	O
browser	O
hijacker	O
,	O
as	O
it	O
often	O
installs	O
itself	O
without	O
user	O
's	O
consent	O
after	O
being	O
installed	O
by	O
another	O
application	O
,	O
and	O
once	O
installed	O
it	O
is	O
difficult	O
to	O
remove	O
.	O
</s>
<s>
Hao123	B-Application
has	O
been	O
accused	O
of	O
using	O
Windows	O
service	O
,	O
registry	O
and	O
browser	O
parameters	O
to	O
modify	O
the	O
browser	O
's	O
default	O
setting	O
and	O
prevent	O
being	O
removed	O
or	O
uninstalled	O
by	O
adding	O
itself	O
back	O
through	O
Windows	O
service	O
.	O
</s>
<s>
For	O
this	O
reason	O
,	O
Hao123	B-Application
is	O
considered	O
as	O
malware	O
by	O
many	O
anti-virus	B-Application
programs	I-Application
.	O
</s>
<s>
However	O
,	O
because	O
Baidu	B-Application
antivirus	B-Application
software	I-Application
will	O
force	O
hao123	B-Application
to	O
be	O
the	O
IE	O
homepage	O
,	O
it	O
was	O
boycotted	O
by	O
Thai	O
netizens	O
.	O
</s>
