Programme I,
Create a new user under the Win7 system, due to the Win7 of a program or function can not be performed, many times because of the misoperation caused the program to prohibit the use of the account log in, and if the rebuild a login account, and the smooth entry, the consequences of such misoperation, cannot be executed while the new account is logged on, the problem with the Clipboard failure is resolved.
Programme II,
The first thing to consider is whether some of the programs you have installed in the Win7 system have caused this problem, and if you do not want to uninstall the programs and software installed in the Win7 system, you can choose to perform a clean boot mode, so that after you perform the clean boot mode, The Win7 system can eliminate conflicts between computer programs and software after startup. (PS: Before performing a clean boot, it is recommended that the Win7 system user switch to admin mode and then open) in order to ensure a smooth start.