Preferences>Display & Sound>Full Screen unticked.
If tht doesnt work, select the fm icon on your desktop, right click and press properties....
Where it says Target: C:/Program Files/Sports Interactive/FM 2007/FM.exe
add " -small_screen-windowed" to the end. When its opened again it should be windowed.
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i.e: Put Target as this,
"C:\Program Files\Sports Interactive\Football Manager 2007\fm.exe" -small_screen -windowed
finished a very poor 8th in first season with liverpool(lack of a tactic)
second season i got a good tactic half way through and ended up winnin the uefa cup with a 1-0 win over chelsea, and finishing 3rd in the league
3rd season is going good , in 2nd after 9 games, but man utd look very hard to beat