I tried to install patches Magento SUPEE-1533, SUPEE-5344 CE 1.8.1 without ssh access direct file upload but after install there's error both backend and website became unaccesable so i replaced all files with old one
SUPEE-1533
app/code/core/Mage/Adminhtml/Block/Dashboard/Graph.php
app/code/core/Mage/Adminhtml/controllers/DashboardController.php
SUPEE-5344
app/code/core/Mage/Admin/Model/Observer.php
app/code/core/Mage/Core/Controller/Request/Http.php
app/code/core/Mage/Oauth/controllers/Adminhtml/Oauth/AuthorizeController.php
app/code/core/Mage/XmlConnect/Model/Observer.php
lib/Varien/Db/Adapter/Pdo/Mysql.php
but there's error now when try to access backend . frontend is fine.
Mage registry key "_singleton/catalogsearch2/feed" already exists