In the following section, you can find the best 15 system tools available in NirSoft Web site.

If you want to download a package of all the tools listed below in one zip file, click here

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ProduKey	ProduKey is a small utility that displays the ProductID and the CD-Key of MS-Office, Windows, Exchange Server, and SQL Server installed on your computer. You can view this information for your current running operating system, or for another operating system/computer. This utility can be useful if you lost the product key of your Windows/Office, and you want to reinstall it on your computer.
RegScanner	RegScanner is a small utility that allows you to scan the Registry, find the desired Registry values that match to the specified search criteria, and display them in one list. After finding the Registry values, you can easily jump to the right value in RegEdit, simply by double-clicking the desired Registry item. You can also export the found Registry values into a .reg file that can be used in RegEdit.
OpenedFilesView	OpenedFilesView displays the list of all opened files on your system. For each opened file, additional information is displayed: handle value, read/write/delete access, file position, the process that opened the file, and more... Optionally, you can also close one or more opened files, or close the process that opened these files. This utility is especially useful if you try to delete/move/open a file and you get one of the following error messages: Cannot delete [filename]: There has been a sharing violation. The source or destination file may be in use. Cannot delete [filename]: It is being used by another person or program. Close any programs that might be using the file and try again. When you get one of these error messages, OpenedFilesView will show you which process lock your file. Closing the right process will solve this problem. optionally, you can also release the file by closing the handle from OpenedFilesView utility. However, be aware that after closing a file in this way, the program that opened the file may become unstable, and even crash.
FileTypesMan	FileTypesMan is an alternative to the 'File Types' tab in the 'Folder Options' of Windows. It displays the list of all file extensions and types registered on your computer. For each file type, the following information is displayed: Type Name, Description, MIME Type, Perceived Type, Flags, Browser Flags, and more. FileTypesMan also allows you to easily edit the properties and flags of each file type, as well as it allows you to add, edit, and remove actions in a file type.
ShellExView	Shell Extensions are in-process COM objects which extends the abilities of Windows operating system. Most shell extensions are automatically installed by the operating system, but there are also many other applications that install additional shell extension components. For example: If you install WinZip on your computer, you'll see a special WinZip menu when you right-click on a Zip file. This menu is created by adding a shell extension to the system. The ShellExView utility displays the details of shell extensions installed on your computer, and allows you to easily disable and enable each shell extension.
ShellMenuView	ShellMenuView is a small utility that display the list of static menu items that appeared in the context menu when you right-click a file/folder on Windows Explorer, and allows you to easily disable unwanted menu items.
SysExporter	SysExporter utility allows you to grab the data stored in standard list-views, tree-views, list boxes, combo boxes, text-boxes, and WebBrowser/HTML controls from almost any application running on your system, and export it to text, HTML or XML file. Here's some examples for data that you can export with SysExporter: The files list inside archive file (.zip, .rar, and so on) as displayed by WinZip or 7-Zip File Manager. The files list inside a folder. The event log of Windows. The list of emails and contacts in Outlook Express. The Registry values displayed in the right pane of the Registry Editor. The data displayed by SysInternals utilities (Registry Monitor, File Monitor, Process Explorer, and others.) The text inside a standard message-box of Windows. The HTML inside any instance of Internet Explorer.
USBDeview	USBDeview is a small utility that lists all USB devices that currently connected to your computer, as well as all USB devices that you previously used. For each USB device, exteneded information is displayed: Device name/description, device type, serial number (for mass storage devices), the date/time that device was added, VendorID, ProductID, and more... USBDeview also allows you to uninstall USB devices that you previously used, and disconnect USB devices that are currently connected to your computer. You can also use USBDeview on a remote computer, as long as you login to that computer with admin user.
CleanAfterMe	CleanAfterMe allows you to easily clean files and Registry entries that are automatically created by the Windows operating system during your regular computer work. With CleanAfterMe, you can clean the cookies/history/cache/passwords of Internet Explorer, the 'Recent' folder, the Registry entries that record the last opened files, the temporary folder of Windows, the event logs, the Recycle Bin, and more.
MyEventViewer	MyEventViewer is a simple alternative to the standard event viewer of Windows. As oppose to Windows event viewer, MyEventViewer allows you to watch multiple event logs in one list, as well as the event description and data are displayed in the main window, instead of opening a new one. Also, with MyEventViewer you can easily select multiple event items and then save them to HTML/Text/XML file, or copy them to the clipboard (Ctrl+C) and then paste them into Excel.
DriverView	DriverView utility displays the list of all device drivers currently loaded on your system. For each driver in the list, additional useful information is displayed: load address of the driver, description, version, product name, company that created the driver, and more.
RegDllView	RegDllView is a small utility that displays the list of all registered dll/ocx/exe files (COM registration). For each registered file, you can view the last date/time that it was registered, and the list of all registration entries (CLSID/ProgID). RegDllView also allows you to unregister dll/ocx files that you don't need on your system anymore. If you have dll/ocx files that don't exist on your system anymore, but their registration entries are still exist in your Registry, you can manually remove these entries by using 'Delete All Entries For Selected Files' option.
URLProtocolView	URLProtocolView is a simple utility that displays all URL protocols (for example: ftp:, telnet:, mailto:) that are currently installed on your system. For each URL protocol, the following information is displayed: The protocol name, the protocol description, the command-line that is executed when you type or click the URL, the product name, and the company name. This utility also allows you to easily enable/disable the URL protocols.
ProcessActivityView	ProcessActivityView creates a summary of all files and folders that the selected process tries to access. For each file that the process access, the following information is displayed: Number of times that the file was opened and closed, number of read/write calls, total number of read/write bytes, the dll that made the last open-file call, and more...
RegFromApp	RegFromApp monitors the Registry changes made by the application that you selected, and creates a standard RegEdit registration file (.reg) that contains all the Registry changes made by the application. You can use the generated .reg file to import these changes with RegEdit when it's needed.