There is usually no way to store information about window positions and sizes in Windows. When you open the application or window anew you need to use the mouse to move and resize it so that it fills the part of the screen that you want it to.
Winsize2 is a Open Source software program that can automatically store information about a windows location and size. The information will be applied to the window whenever it is opened in Windows.
The program has been developed with AutoHotkey which is identified as malicious by some antivirus applications. Please note that those are false positives.
Usage has been simplified. There is only one hotkey that is used to save the window size and location of the active window, to delete the information and to set the options in WinSize2. You can configure exact X/Y coordinates and widths / heights for the windows or to set them to be always on top.
Pressing the hotkey [CTRL ALT Z] (Y instead of Z on some systems) once will save the information while pressing it twice or thrice will delete them again or load the options for that window.

Winsize2 is excellent to place specific windows and applications automatically on the monitor screen without having to resize or move them whenever they are started.
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Tried it on XP Media Center 2005 and it didn’t work…
@Nick: “did not work” is a little bit short. Please a more detailed description. (mail at SourceForge)
I’m so glad someone created this app. I’ve been using Winsize 1.6 beta from a long time ago but it causes some strange behavior in XP. This app is easier & works great! It’s a must have for anyone that uses the Admin Tools a lot since they never “remember” their size or position. Thanks much!!
It is not working with Vista… :(
Perfectly alrite now..excellent..!! thanks.