PC Wizard (Version: 2010 1.961 as of this post) is a freeware from the same developers as CPU-Z, the popular CPU information utility. PC Wizard provides a lot of information about its host PC.
Upon startup, which takes a few seconds, the Hardware section is first.
Hardware has 12 sections for System Summary, Mainboard, Processor, Video, I/O ports, Drivers, Printers, Devices, Multimedia, Network, Power Status and finally Voltage, Temperatures and Fans. The information available are specs for system manufacturer, Direct X, PCI slot, Open GL, disk drives, Twain devices, UPnP, audio and video codecs, network card and connection, battery status, if applicable, and lots more.
The Configuration section features information on Windows serial number, system uptime, default browser, default email client, control panel, desktop appearance, running processor and threads, DLL files, OLE applications, Microsoft components, fonts, Windows updates installed, uninstall info, startup info, file extensions, Window security status, services, .NET Framework and also a passwords section. Interestingly passwords detected one old and one current MSN (Live) Messenger password on the PC tested!
The System Files section has viewers for boot.ini, system.ini, event logs, internet explorer cookies and history and a section on environment variables such as system paths, architecture and more.
Resources section has IRQ info and a network sniffer with a list of IPs, ports and their state (listening, established, etc.)
The Benchmark section has tools for various memory, processor and video tests and a global performance benchmark test to do them all together.
Each section is printable and highlighted entries can be captured by the clipboard. The Tools menu has extras for enabling processor monitoring and gathering overclock information. PC Wizard is by no means the fastest program. Some info, like the DLL list for example, take a bit more than a few additional seconds to gather and present.
PC Wizard is available in both portable and installer versions and should run on all Windows versions. As always with benchmark and system profile utilities some information may not be available if they are not supported either by the software or if they are not present on the host system.