when i put the windows disk in to format everything and reinstall windows (becouse i dont have many files on the thing)
When you boot from the installation media, at the first installation screen, hold the shift key and strike F10 on your keyboard.
That should bring up a command prompt window, in that window type
diskpart
hit enter
At the diskpart prompt type
list disk
hit enter
You should see a list of the physical drives installed in your computer. (
IT IS ABSOLUTELY CRITICAL, if you have more than one physical drive installed that you target the correct drive with the following)
Now type
select disk and the corresponding number IF you only have one physical disk installed, then the command would look like this
select disk 0
You should then see "Disk # is now the selected disk" now type
clean
hit enter
you should see "DiskPart succeeded in cleaning the disk" now type
exit
To close DiskPart
type
exit
again to close the command prompt window
Continue with the install and selected the unallocated space now on disk 0 for your target
NOTE: The above commands will wipe the physical disk you target in the command without consideration of any previous partitions or content, the entire disk and all content will be gone, so.....
Don't do it, unless you understand and accept the consequences.