If you’re forever being asked to “Come over for a visit, and btw, fix my computer, pleeeease!”, or even if only for your own needs, IObit Toolbox is “It”. I recommend it highly!
It’s a free, portable collection of software tools that system administrators and (really) just anyone can take along to solve PC problems anytime and anywhere on a flash drive. It can also be installed on your home system.
"With more than 20 dedicated tools (26 to be exact), IObit Toolbox allows you to display/diagnose PC information, enhance PC security, optimize PC performance and repair PC problems. IObit Toolbox has more than 20 computer tools – all in one place, so you have more than 20 ways to diagnose and fix PC problems, including cleaning, optimizing, repairing, and fixing/enhancing security and fully control."
IObit toolbox (portable) requires no installation as the tools are exe’s. If you install it on your home system, it occupies 26.4 Mb's.
Also, it occupies little room on your disk. Each admin tool in IObit Toolbox is a stand-alone and the package is organized very well.
This newest edition has a much improved user interface.
Download link: http://download.cnet.com/IObit-Toolbox/3000-2094_4-75221761.html
IObit's other free products, and another download link: http://www.iobit.com/products.html