After installing Service Pack 1 on a Windows 7-based computer, you may see the following text displayed on the lower right corner of the desktop:
Windows 7 Evaluation Copy build 7601
This issue can occur if you installed a Beta version of Windows 7 Service Pack 1 (SP1) on your Windows 7-based computer.
To resolve this issue you will need to uninstall the Beta version of Windows 7 Service Pack 1 (SP1) and then install the released version of the Service Pack.
Click Start button, then click control panel
Click Uninstall a program
Browse through the list and right-click Service Pack forMicrosoft Windows (kb976932)
Click Uninstall and then click Yes when asked if you want to uninstall this update.
Click the following link and then follow the instructions for downloading and installing the released version of the Service Pack