Benefits of the program probably questionable

My PC with Windows 7 had become more and more slowly after about 3 years of use, and hanged himself lately from time to time on or took tens of minutes when it starts. According to the manufacturer's instructions and positive reviews I therefore hoped for by TuneUp Utilities 2012 a viable cleaning solution to avoid a (time) consuming Neuaufsetzen the whole system. For me at least, the application of TuneUp Utilities resulted in no (!!!) improvement in my Windows computer. Although I am an experienced PC users, but also not a technology nerd, so I do not really know in detail why my Windows now made these problems or exactly where in the operating program, the technical errors had set. That's why I was hoping just to this program because according to advertising messages, therefore, effective cleanup work would done in Windows. But as I said: zero effect on me !!! I can most positively say a trial is / was worth it. Very expensive, the program is not so. But I think the software for a whisk program that promises more than it holds. At least skepticism is appropriate in my view, with respect to this software.
PS: I liked "brute force" helped in the end. I first made a precautionary backup my personal documents. Then I waited until my PC at boot / start the next time you hang up again. When that happened, I simply pulled the power plug. During the subsequent restart Windows performed a self-repair. I have made four times and twice led Windows 7 then a program chkdsk. And lo and behold - now my Windows is running again as fast as before. I would like to expressly point out that I've done this procedure intuitively and probably no universal panacea for Windows - has problems.