Have you tried:
– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).
– switching to the Twenty Eleven theme to rule out any theme-specific problems.
– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.
– re-uploading the wp-admin and wp-includes folders from a fresh download of WordPress.
– deactivating .. no solution
– switching to twenty eleven .. no solution
– resetting plugins … no solution with the speed
i will try the last suggestion and i will inform. Thanks
If i make this step – re-uploading the wp-admin and wp-includes folders from a fresh download of WordPress – is there any problem with existing site?
nothing … i tried all of them! also i found that i had a file upd.php that has a trojan!Ideleted the file and i am searching the whole site. I use latest timthump, new includes, admin , wp-confg and etc. But the problem exists.Also i checked my site with sukuri.net tool and it didn’t find any virus or trojan! Any suggestions? I see that there is a hole in wordpress or in some plugins?
Solved! I had a malicious code in admin.php file! Suggestion to all. Be carefull .. there is trojan for wordpress . i had latest timthump.php file , so the problem is somewhere else! Thanks esmi!