Why does the cursor disappear while typing or moving the mouse in a field of text using Windows XP?
There may be a problem with the cursor software or spyware. If you are using Logitech, MouseWare, or MS Intellipoint mouse software, try uninstalling that software or reinstalling a newer version. Also, try running an anti-spyware scan. If these do not fix the problem, click Start, click Control Panel, double-click on the Mouse icon, click the Pointer Options tab, uncheck “Hide pointer while typing”, and click OK.