When upgrading from Windows XP to Windows 7 (SysPro 6.0 010 SP2, not sure of others), the screens will misbehave and you have to keep resizing but they won’t remember their new sizing.
First, make sure that all permissions are set to either Everyone or to Authenticated Users for the SYSPRO6\ folder. Then making sure that SysPro is closed, copy IMPCENTR.INT in the base/bin folder from the server to the client. Open SysPro and log in. You will be able to resize the windows and they will remember their location.