Typed letters keep getting thrown back into earlier part of sentence on ms word

Hi,
Sounds like you need to remove a virus or malware. Go to:-
http://housecall.trendmicro.com/
or:-
http://security.symantec.com/sscv6/WelcomePage.asp
Download and run to remove any viruses you may have. (Sometimes a virus will stop you accessing an anti-virus site, so try going through safe mode (Tap F8 on boot up) and see if you can access it there.)
Then go to :-
http://www.malwarebytes.org/
or;-
http://majorgeeks.com
Download, run then quick check your PC for any problems, if still there do a full scan.

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