Compatibility mode is a Windows XP option:
To take the program out of compatibility mode:
Click Start, and then click All Programs.
Point to Accessories, and then click Program Compatibility Wizard.
In the wizard, click Next.
Click I want to choose from a list of programs, and then click Next.
Click to select the program that you were attempting to use, and then click
Next.
Under Select a compatibility mode for the program, click Do not apply a
compatibility mode, and then click Next.
Under Select display settings for the program, click Next.
If you are asked whether you want to simulate administrative privileges, do
not select anything, and then click Next.
Click Next under Test your compatibility settings.
The program that you selected starts. This allows you to test whether the
program functions correctly with the new settings.
When you are finished testing the program, quit the program.
Click Yes, set this program to always use these compatibility settings, and
then click Next.
Select whether you would like to send to Microsoft information about the
selected settings and how they helped you to solve the problem, click Next,
and then click Finish.
http://support.microsoft.com/default.aspx?scid=kb;EN-US;285909
How to Troubleshoot Program Compatibility Issues in Windows XP
http://support.microsoft.com/default.aspx?scid=kb;EN-US;292533
HOW TO: Use Windows Application Compatibility Mode
