Question : remove old computers from active directory 2008

I have active directory 2008.  I'm sure I have lots of computers in there that are old and should be cleaned up.  Is there a tool that can do this based on the last time a computer was logged onto or some other way?  I can't see how to filter that in AD.

Thanks,

Answer : remove old computers from active directory 2008

old computer by MVP Joe Richards is my favorite tool for this

http://www.joeware.net/freetools/tools/oldcmp/index.htm

What we do where I am is disable after 120 days and delete after 180 days.

oldcmp -report

That is a good starter report to show you all machines > 90 days.  joe has a great help section too.

He also has a -users switch if  you want to look for old/stale users.

Thanks

Mike