I did a silly thing, and installed a custom login program. As soon as I did, I decided I didn't want it, so I uninstalled it and forgot about it. Later that night I was burning a DVD while I was out, and my genius sister decided it was a good time to use the PC - thanks to the program, fast user switching and the welcome screen is disabled, so my before-mentioned genius sister decided to log me out. I googled the solution and fixed it (http://windowsxp.mvps.org/ginadll.htm) but the Welcome screen and fast user-switching still won't work. I need it back, because my sister doesn't ask if she can use the computer or not - she just does. Any ideas?