Guys, thanks a lot for all this help and advice.
I went to this Disk Management and got lots of numbers but, in my case, I don't understand what are they for?!
I have only one Disk0 - Only one partition.
and on the top I have 3 lines:
Volume:
First one empty - capacity 10.06 GB - Status Healthy EISA Configuration Space - FREE 10.06GB (what is that?)
Second C: - capacity 176.24GB - Free 43.91GB
Third F: - Capacity 0 - Free 0
That's the only thing I have in this Disk Management. My laptop is a 200GB but I understand you never get the whole space.
Thanks again for all advice you kindly send to me.
Anderson