Matlab errors in initialization

Tosh5457

My Matlab was fine, until one day these messages started appearing on the console when I start Matlab:

Warning: MATLAB Toolbox Path Cache is out of date and is not being used.
Type 'help toolbox_path_cache' for more info
Undefined function or method 'mpower' for input arguments of type 'struct'.
Warning: MATLAB did not appear to successfully set the search path. To avoid this
warning the next time you start MATLAB, use
http://www.mathworks.com/access/help.../pathdef.shtml
to help troubleshoot the "pathdef.m" file. To recover for this session
of MATLAB, type "restoredefaultpath;matlabrc".
Warning: Duplicate directory name: C:\Program Files\MATLAB\R2010a\toolbox\local.
Warning: Initializing Handle Graphics failed in matlabrc.
This indicates a potentially serious problem in your MATLAB setup,
which should be resolved as soon as possible. Error detected was:
MATLAB:UndefinedFunction
Undefined function or method 'colordef' for input arguments of type 'double'.
> In matlabrc at 102
Warning: Initializing Java preferences failed in matlabrc.
This indicates a potentially serious problem in your MATLAB setup,
which should be resolved as soon as possible. Error detected was:
MATLAB:UndefinedFunction
Undefined function or method 'usejava' for input arguments of type 'char'.
> In matlabrc at 125
Warning: Failed to add default profiler filters.

What is this? And why did these messages start appearing out of nowhere?
Also, functions like quad just don't exist. I can't use them and I can't even find them in the function browser. I just re-installed Matlab, but the same thing is happening...