Hi Charan,
Aside from reinstalling WordPress, being that you already deactivated all plugins, have you also switched back to the default WordPress theme (i.e., Twenty Fifteen)? The goal here being that we want to eliminate any kind of 3rd party integration issue first. After that, it should be a near-default WordPress install and whatever your web host provides.
If, after switching back to the default theme and at the same time having all your plugins remain inactive you’re issue persists, then I would wonder if any hacking has been done by you or someone else to your core WordPress files? Because, if so, a reinstall might just fix things up. On the other hand, if no hacking has occurred and your issue continues, then I would call your web host and let them know what’s going on.
P.S., I guess the BIG question of the day is when did you first notice the issue? And an even BIGGER question is what do you remember last doing just before the issue occurred. The latter being the $1,000,000 dollar question. 😉
Hope this helps,
Randy
Thanks, I have noticed that my jquery is hacked in server
You’re very welcome. In this case, I would take a look at this handy guide:
http://codex.ww.wp.xz.cn/FAQ_My_site_was_hacked
