The feature of Windows 7 that allows users to emulate the DPI scaling of Windows XP is not compatible with Thinix Touch. If the “Use Windows XP style DPI scaling” checkbox is greyed out and unavailable to modify, then it is likely that one of the following scenarios is true
Please check your settings to verify that these cases are true. If you have Windows Aero disabled, you may need to re-enable it, disable the Windows XP style DPI scaling setting, and re-disable Aero. If you are using a 3rd-party application to manage your visual settings, please look through their options to determine if this is configured through that application.