I have a three part questionfor you computer geeks..How do I separate the hour glass from my pointer.?

From the minute iturn on my computer,the hour glass becomes wedded to the pointer and will not leave its side through every click It goes where ever the pointer goes and I”M sure slows my computer if not worse..How do i divorce them?.the second question is-do I have to leave my computer on fora scan scheduled for1 in the morning.Will the scan occur if my computer was turned off.the third issue is :what free download is out there which will not only scan but eliminate viruses, spyware, adware, worms, trojans etc.