Hey there, welcome to Google Chrome Board!
Sorry to hear you had trouble with your upgrades

hopefully this will help you!
# Windows XP: C:\Documents and Settings\<USERNAME>\Local Settings\Application Data\Google\Chrome\User Data\Default\History
# Windows Vista: C:\Users\<USERNAME>\AppData\Local\Google\Chrome\User Data\Default\History
If you can find that file but for some reason can't use it in Chrome again follow these instructions to retrive bookmarks from that file:
Export Google Chrome Bookmarks.