To run a system restore via task manager:
Launch the Task Manager by pressing "Ctrl," "Alt" and "Delete" together.
Click the "File" menu and click "New Task (Run)" to launch the "Run Command" window. Type "C:\windows\system32\restore\rstrui.exe" (without quotes) and press "Enter" to launch the System Restore utility.
Click the "Create a new restore point" radio button on the welcome screen if you want to create a new backup. Type the name of the backup and click "Create." By default, Windows creates restore points automatically, but you can create a backup.
Click the "Restore my computer to an earlier time" radio button if you want to perform a System Restoration process. Select the day to restore your computer to and run the System Restoration wizard.
Click the "Undo my last restoration" radio button on the welcome screen if you want to undo a previous restoration process.
Read more: How to Run System Restore From Task Manager | eHow.com http://www.ehow.com/how_5810717_run-system-restore-task-manager.html#ixzz1lfMorCtt