A PC I have has Windows 7 installed on a 40 GB SSD, and I bought a Windows 8 upgrade for it. The current Windows folder on it however is 22 GB, that's after removing hibernation, turning off the pagefile and removing all extra programs/features. So even if I purge every other file and folder, the Windows folder itself takes more than half the disk. The PC also has a 1 TB HDD, but the upgrade installer didn't give me any options about choosing another drive. So, is my only option to reinstall Windows 7 on a larger drive, then proceed with the Windows 8 upgrade? Or is there anything I can remove from the Windows folder that while might be dangerous for long term usage, is fine for the few minutes I need to get Windows 8 installing?