This displays the Run dialog box. " Click "OK" to start the Regedit program.  If you are using Word 2010, select the HKEY_CURRENT_USER/Software/Microsoft/Office/14.0/Word <keychoice>. If you are using Word 2007, select the HKEY_CURRENT_USER/Software/Microsoft/Office/12.0/Word <keychoice>. If you are using Word 2003, select the HKEY_CURRENT_USER/Software/Microsoft/Office/11.0/Word <keychoice>. If you are using Word 2002, select the HKEY_CURRENT_USER/Software/Microsoft/Office/10.0/Word <keychoice>. If you are using Word 2000, select the HKEY_CURRENT_USER/Software/Microsoft/Office/9.0/Word <keychoice>. A prompt will ask if you really want to delete the key. Select "Yes."  It should now be restored to default settings.

TL;DR in Indonesian:
Klik opsi "Run" dari menu Start. Pada kolom "Open", masukkan "regedit". Tekan tombol Delete. Tutup Registry Editor. Mulai ulang Microsoft Word.