hi How do I access the Administrator account? i cannot log on to my windows 7 system with administrator right

The built-in administrator account is disabled by default. The first user account created on the system though is administrator of the machine, are you saying that you have lost all login information to the machine? Sometimes it can appear that you are not using an administrative account becuse of User Account Control which makes everyone run with standard user priviligies until something requires more priviliges, such as installation of software, system changes etc.Blogging about Windows for IT pros at www.theexperienceblog.com

Right click an application and selecting Run as Administrator runs this application effectively with the built in Administrator permissions. While you can enable the built in Administrator account (at least on Windows 7 Professional, Ultimate, Enterprise, not sure for the Home versions) with the command net user Administrator /active:yes this is not recommended due to system security reasons. UAC is practically off, and any malware running in this context is easy able to capture your system completely. Best greetings from Germany Olaf