First, uninstall all the programs that are giving you problems through Start Menu -> Control Panel -> Uninstall a program. Then, uninstall all Visual C++ Redistributables software through Start Menu -> Control Panel -> Uninstall a program.
Once you have finished uninstalling the software, install the following:
Visual C++ 2005 Redistributable (x86)
Visual C++ 2008 Redistributable (x86)
Visual C++ 2010 Redistributable (x86)
Then install their updates through Windows Update. Then install the software again that you had been having problems with.
Also, stop using registry cleaners to try to fix problems; they just create more problems:
Many of us on the forums actually do not recommend automated optimization tools for Windows 7. Windows 7 does a much better job of handling its own optimization than its predecessors did. We especially do not recommend registry cleaning as an "optimization" step because automated registry cleaning causes more harm to the registry than it actually repairs.
In the future, if you need help optimizing Windows 7, please post a thread in Performance & Maintenance - Windows 7 Forums or follow the tutorial enclosed in that forum to Optimize Windows 7.
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