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This is a known issue and there is a fix for it. This error means that one or more of the registry entries that are provided in the following table are missing from the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Nls\CodePage registry subkey..
For more information on this error code and how to fix this issue, visit this link below.
To answer your question about a registry cleaner software, we do not recommend to use any type of registry cleaner since the registry is very sensitive and a third party software could damaga your computer, registry cleaner will not solve your issue.
Reading on simmilar issues, i have noticed some that are getting the bootstrapper error and they solved it by inserting the DVD in a secondary CD\DVD drive. If you have more than one DVD drive try inserting the DVD in both. see if one of them works.