So I just got a new Dell XPS running Win7 home premium and I wanted to fool around a bit with it so I decided to try to change the theme to a third party download. I followed the instructions given to me which required me to "patch" windows so I did, there were 3 themes patches that I did and then I rebooted. Afterwards I followed the rest of the instructions but skipped the ones that replaced the system font. I added files to cursors, windows/resources/themes, and /media. I downloaded orb changers as well to change the start orb. I went to system preferces and applied the theme and then I also changed the display to make the window size larger. I logged off and when I tried to log back on, the screen was blue with a cursor. a notification window came up saying that explorer.exe failed to open. I tried using task manager but it also didn't start correctly. When I try to open boot options it continues rebooting then goes to a plain black screen. Help meeee

Have you tried booting in safe mode? what happens?

Please run System Restore. if it does not help, create a new user account and log on with it. If the issue does not occur this time, follow the steps in the website below. Fix a corrupted user profile http://windows.microsoft.com/en-US/windows-vista/fix-a-corrupted-user-profilePlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.