Your best software for ensuring the PC is running smoothly is located somewhere between your left and right earholes.
Keeping a check on what is installed on the PC, what runs at start up and generally not blindly installing all sorts of unnecessary junk is all you need. And all the tools to do that are already installed on your PC. For example msconfig to control start up programs.
A tool like CCleaner can be handy to sort out all the junk that accumulates on the PC over time. But basically if you are careful over what you install and allow to run on the PC you won't go too far wrong.
And as max99 says if there is a problem then chances are you can sort it without resorting to software that may well be of dubious value anyway.
I've used CCleaner and Auslogics Disk Defrag and Registry Cleaner for a few years now - all free and work well. Some might question the necessity of a registry cleaner, but I've never encountered any issues using one and it does get messy if you install/uninstall software frequently.
Also, if you're using Windows 7 or 8 then the built-in disk defragmenter is adequate.
Comments
http://www.techsupportalert.com/best-free-pc-tune-up-utility.htm
but take note of the warnings
tunning present participle of tun
Verb
Store (wine or other alcoholic drinks) in a tun.
I wouldn't store wine in a PC.
If you mean tuning, then forget it; most PC tuning software is rubbish. Just remove program's you don't use, run defrag, and maybe use Ccleaner.
So if there's a specific problem or something you want to achieve, post back with more info (including the spec and version of Windows).
Keeping a check on what is installed on the PC, what runs at start up and generally not blindly installing all sorts of unnecessary junk is all you need. And all the tools to do that are already installed on your PC. For example msconfig to control start up programs.
A tool like CCleaner can be handy to sort out all the junk that accumulates on the PC over time. But basically if you are careful over what you install and allow to run on the PC you won't go too far wrong.
And as max99 says if there is a problem then chances are you can sort it without resorting to software that may well be of dubious value anyway.
Also, if you're using Windows 7 or 8 then the built-in disk defragmenter is adequate.