So I tried installing/upgrading my HP Compaq (fully sufficient specs) running Vista Home Edition to Windows 7.
I continuously get the error for upgrade that
No disk space is available and if I try a fresh install (x64/x86) then I get
No hard drive found.
At first it had an OEM partition, so I used easeUS to merge the partition to the C:/ drive, yet still got the problem (bear in mind I have 110gb free). So then I tried splitting into two partitions, one half having 110gb (20 free) and the over 90gb. However I still get the same problem, no matter what I try.
I think this may be quite an old version of W7..