I understand it is not supported. From Bill's Blog:
'Please note the version of Workbench provided in the FRC Kit of Parts (2009 – 2011) is not certified for use on 64-bit Windows operating systems. Please use the C/C++ section of the FIRST Forums for questions about this issue '
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http://frcdirector.blogspot.com/2010...0000-feet.html ]
I installed Workbench on my Win 7 64-bit laptop with no trouble and have done a little work in it. That being said, a few hours' worth of tooling around probably wouldn't show up many problems.
I'd like to hear from someone who has worked with Workbench on a 64-bit system for longer than I have....here's hoping students' new batches of Christmas laptops won't be obsolete in FIRST this year

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Team 956: Celebrating ten years of FIRST!
Code:
Team record 2002-2011
2002: Highest Rookie Seed, AOR
2003, 2006, 2012: Xerox Creativity Award, AOR
2006: Semi-finalist, Sacramento Regional
2009: Quarter-finalist, AOR
2010: Quarter-finalist, AOR
2011: Semi-finalist, AOR, and Dean's List finalist, AOR
Personal record:
2008: Lead scout
2009: Lead scout, publicity
2010: Lead scout, publicity, fundraising, Chairman's, videography
2011: Team captain, lead programmer, fundraising, Chairman's, publicity, wrench-turning, Dean's List finalist at Autodesk Oregon Regional