A computer that hangs when you open several windows and run a few programs might need to be cleaned up. It is highly suggested that as apc owner, you should perform regular windows registry clean up.
To ensure that these issues do not arise or that they are kept minimal, it is good to use reliable and safe registry repair software occasionally to keep the system registry in check and in good running condition.
Performing a windows registry clean up can help in making your pc perform better. Before you decide to do this, be sure you have all the information you need and consider using a registry cleaner to do the job for you.