I used Revo Uninstaller to remove my 3.2 (or was it 3.3.2?) on Win-7. It hung
with the progress bar at about 80% of completion for over two hours, never
moving further. In the selection window (similar to Control Panel Add/Remove
window), I saw that I had told it to uninstall the main program and that the
Help module (or whatever it was called) had not started. On a whim, I started
another instance of RU and told it to uninstall the help section. I chose the
slowest, most thorough number 4 setting for both uninstalls. Long story short
-- it then completely uninstalled both 'halves' in about a minute and I'm ready
to DL the 3.3.3 final and install it.
Don't know if this'll help anyone else, but it [apparently] needs to remove the
help files first. Hopefully the new install will go smoothly. I have never
experienced a problem installing either OOo or my first shot at LibO.