logon studio log on screen color issue´s

Hello,
i hope some one here can help me because this is driving me nuts, i have been using logonstudio to change my log on screen everything was going good had no problems worked like a charm , until a few hour's ago i went to switch user's and was waiting for my log on screen to pop up but i waited and waited until i got sick of waiting and turned off the power to my computer when the computer booted back up i had no logon screen just the very simple type user name here and password, so i did that when my desktop booted up i got a error saying my window log on was missing a file or file's could not be found, and since then my log on screen's look like they got 8 bits of color and look terrible you can barely make out anything and no matter what log on screen i put on it looks like that except the original boring windows log on screen, so if you knows the problem please help if not do you know of a good tech forums i could go to for help?