We rarely recommend 'Tune-Up' utilities because experience in these forums show that they are either unreliable or users don't understand what they are doing.
We never recommend Registry Cleaners. The risk of serious damage is too great.
However we do often recommend CCleaner from http://www.piriform.com/ for cleaning out Temp folders and Temporary Internet Files, and so on. With it's stock settings and not touching it's registry check option, it is quite useful and harmless.
I hope that helps.
From the last few days I've been using many PC Utilities programs to make my computer fast and tune up...But I am not so sure about their performance..the results are confusing.Different tune up programs show contradictory results...So I am asking u people to suggest me a really proven Tune up software that I can make my PC fast..free from junk file..really good optimization and reliable registry cleaner..