Word Press on Windows Error

Hi,

I got this error from word press, and similar error messages on everywhere of the blog, and usually appears at the bottom of the page.

We didn't have this kind of errors before.

Login Page:
"WordPress database error Got error 127 from table handler for query SELECT meta_key, meta_value FROM wp_usermeta WHERE user_id = 1 made by _fill_user"

Main Page:
"WordPress database error Got error 127 from table handler for query SELECT t.*, tt.*, tr.object_id FROM wp_terms AS t INNER JOIN wp_term_taxonomy AS tt ON tt.term_id = t.term_id INNER JOIN wp_term_relationships AS tr ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN ('category', 'post_tag') AND tr.object_id IN (12, 11, 9, 8, 7, 6, 5, 4, 3) ORDER BY t.name ASC made by wp_get_object_terms WordPress database error Got error 127 from table handler for query SELECT meta_key, meta_value FROM wp_usermeta WHERE user_id = 2 made by _fill_user WordPress database error Got error 127 from table handler for query SELECT meta_key, meta_value FROM wp_usermeta WHERE user_id = 1 made by _fill_user WordPress database error Got error 127 from table handler for query SELECT t.*, tt.* FROM wp_terms AS t INNER JOIN wp_term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy IN ('category') AND tt.count > 0 ORDER BY t.name ASC made by get_terms "

Does anyone have any ideas about this?

Thanks in advance.

Regards
eezy2