Autoruns: This utility, which has the most comprehensive knowledge of auto-starting locations of any startup monitor, shows you what programs are configured to run during system bootup or login, and shows you the entries in the order Windows processes them. These programs include ones in your startup folder, Run, RunOnce, and other Registry keys. A "Hide Signed Microsoft Entries" option helps you to zoom in on third-party auto-starting images that have been added to your system.

Free Commander:Freeware file manager for windows.

Process Explorer: is an advanced process management utility that picks up where Task Manager leaves off. It will show you detailed information about a process including its icon, command-line, full image path, memory statistics, user account, security attributes, and more. When you zoom in on a particular process you can list the DLLs it has loaded or the operating system resource handles it has open.

Procmast: Process Master. An advanced utility for hidden processes detection and killing. It successfully detects the presence of such famous rootkits as HackerDefender and Fu.

isReset: A free tool to reset files/folders attributes.

regalyz: Advanced Registry editor

To know about other tools, just google their names.

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