Thank you for reply. My computer's hardware configuration is
Intel(R)
Pentium(R) 4 CPU 2.8GHZ
2.79GHz, 2.00GB of RAM
Hard disk's file system NTFS and free space 217GB and used 80.9 GB.
I use the administration account logging in my computer. I could make sure about it, because I could add another administration account under the logged account.
I am very appreciated for the quick reply.
Thank you again.
xiaoshanj