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Unfortunately, there isn't anyway to bypass the log on screen. In Windows XP, Microsoft made the program and interface more secure through the log in procedure. But the only way is try professional password recovery program. iSeepassword windows password recovery program could reset password of any windows like windows 7, 8/8.1, 10, xp, vista.Guide: http://www.iseepassword.com/how-to-bypass-windows-7-password.html
If your Excel sheet is password protected and you forgot the password, then you need to use an advanced Excel Password Recovery software. iSeePassword Office Password Recovery 5.0 is an easy and effective utility, designed to recover Microsoft Excel passwords, enabling you to easily view the workbooks and sheets for the information.Tutorial: how to recover forgotten excel passwordI would recommend you to try it. Good luck!
ophcrack? It's not always work for admin password. I think you need a better one. Free try this one to recover your admin account password.How to reset windows admin passwordHope it works.