updating from D6 to D7 failed

I am updating from D6 to D7. and just follow what the UPGRADE.txt says but get following messages:
The following updates returned messages
taxonomy module
Update #7005
•Failed: PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'node-3-3-0-0-und' for key 'PRIMARY': INSERT INTO {field_revision_taxonomyextra} (entity_type, entity_id, revision_id, bundle, language, delta, taxonomyextra_tid) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6); Array ( [:db_insert_placeholder_0] => node [:db_insert_placeholder_1] => 3 [:db_insert_placeholder_2] => 3 [:db_insert_placeholder_3] => blog [:db_insert_placeholder_4] => und [:db_insert_placeholder_5] => 0 [:db_insert_placeholder_6] => 1 ) in taxonomy_update_7005() (line 692 of C:\HostingSpaces\pzhang\soxitoday.com\wwwroot\drupal\modules\taxonomy\taxonomy.install).
node module
Update #7006
•Failed: DatabaseSchemaObjectExistsException: Table field_data_body already exists. in DatabaseSchema->createTable() (line 630 of C:\HostingSpaces\pzhang\soxitoday.com\wwwroot\drupal\includes\database\schema.inc).
search module
Update #7000
•Failed: DatabaseSchemaObjectExistsException: Cannot add primary key to table search_dataset: primary key already exists. in DatabaseSchema_mysql->addPrimaryKey() (line 393 of C:\HostingSpaces\pzhang\soxitoday.com\wwwroot\drupal\includes\database\mysql\schema.inc).
.

Here are what I've done for the update.
1. Log in as user ID 1 (the site maintenance user).
2. Go to Administer > Site configuration > Site maintenance. Select "Off-line" and save the configuration.
3. Go to Administer > Site building > Themes. Enable "Garland" and select it as
the default theme.
4. Go to Administer > Site building > Modules. Disable all modules that are not listed under "Core - required" or "Core - optional".
5. On FTP client, remove the file sites/default/default.settings.php
6. Remove all old core files and directories, except for the 'sites' directory;
7. Download the latest Drupal 7.x release. Extract the archive and copy the files into my Drupal directory.
(here my understanding is to include the 'sites' to cover the one I didn't romoved early)
8.Run update.php by visiting http://www.mywebsite.com/update.php.

then I can see the updating page and started to update, the problem is, I got timeout warning first, then I updated it again. after all updates completed, then I got following message from the webpage, it seems that it caused by re-update.

So my question is how can I solve this problem? the finished update page said that you may need to update your database manually. All errors have been logged.

although, it listed the links for FRONT PAGE and ADMINSTRATION PAGE, but first link gave me a 500 error. and the second give me a blank.

I appricate if there are any help.