Windows 7 O&O Defrag Pro 11


New Member
Mar 31, 2009
I have Windows 7 64-bit build 7068. I tried to install O&O Defrag pro 11. I got a message saying i need windows 2000 or later to install...

Is there a way to fix this or is there an older version of this software that works?

this software is supposed to work with 64 bit...

Last edited:
J use O&O from O&O Defrag Professional v11.5.4065.
Last edited by a moderator:
I have tried O&O version 10, 11, and 12 before, if I remembered correctly, version 11 is not compatible with Win 7. I recommend version 10
You'll likely run into such issues since most of the software fixed for windows 7 will now be aimed at only supporting build 7600+ not the beta builds as they are past the "evaluation" period.
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