To customize the look of a mouse pointer in Windows 7, open the Mouse Properties dialog box via the Personalization screen, and select one of the pre-installed pointer schemes from the drop-down menu. In the same dialog box, customize individual pointers by selecting an image in ANI or CUR format.
Open the Start menu, click on Control Panel, and click on the Appearance and Personalization link. Click on Personalization, and then click on the Change Mouse Pointers link. Once the Mouse Properties dialog box appears, open the Pointers tab, open the drop-down menu in the Scheme section, select the desired scheme and click OK. The Customize section displays a list of all pointer variations, including precision, normal, and help selections, and provides a preview of the selected scheme. If you modify an existing scheme, save it as a new one by clicking on the Save As button, typing the name of the scheme and clicking OK.
To modify an existing scheme, click on the mouse pointer you wish to change, click on the Browse button, select the desired mouse pointer image in the Cursors folder, and click Open. If you create custom ANI or CUR image files, or download them from the Internet, select them via the Browse dialog box to use them as mouse pointers. To undo unwanted changes, click on a mouse pointer, and then click on the Use Default button.