For some reason the mouse on my computer oflten freezes. It happens when for example i turn on in the morning and then don't use it again untill later in the day. I find that when i come back to it it has gone on to sleep and the mouse is frozen. This is happening most times. It is connected via a PS/2 connection and I have tried a different mouse and it is the same. I have run multiple virus/malware scans and they are all clean. I am using windows xp. Can this be fixed?