To do this,
-Run Regedit (or Regedt32) and go to: HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics
-Or if you are the only user of your Windows computer go to: HKEY_USERS .Default Control Panel Desktop\WindowMetrics Right-click on an empty spot in the right hand pane.
-Select New -> String [REG_SZ] Value. Name it MinAnimate. Click OK. Double-click on "MinAnimate" and type 0 to turn OFF window animation or type 1 to turn it ON. Click OK.
-Select New -> String [REG_SZ] Value. Name it MinAnimate. Click OK. Double-click on "MinAnimate" and type 0 to turn OFF window animation or type 1 to turn it ON. Click OK.
Close the Registry Editor and restart Windows. Finish