First of all, ensure Word 2010 is closed.
Look under c:\Users\[username]\AppData\Roaming\Microsoft\Word\STARTUP (replacing username with your own) and locate the file you noted, i.e. ~$nereader6.sprint.dot. This is an abbreviated filename denoted by the tilde (~), but you should still be able to find it in that folder. Delete the file and then start Word.
Look under c:\Users\[username]\AppData\Roaming\Microsoft\Word\STARTUP (replacing username with your own) and locate the file you noted, i.e. ~$nereader6.sprint.dot. This is an abbreviated filename denoted by the tilde (~), but you should still be able to find it in that folder. Delete the file and then start Word.