How to seriously reduce the size of Windows on a Windows 7 laptop?
Run the Disk Cleanup (also delete system files here).
You can safely delete the content of the following folders (close all programms before doing):
C:\Windows\Temp\C:\Users\username\AppData\Local\Temp; Note: The Disk letter (in this case C) can be different. Replace "username" with yours. After that reboot.-
If you don't need the hibernate function for that laptop, you can turn it off. This will will give you the amount of memory the laptop has, in disk space:
- open a command prompt (cmd) with administrative privileges
- type in the following command:
powercfg -H off
If you have a second partition, you can change the location of the page file. Default it's on the system disk. Press Windows-Key + R, type
control sysdm.cpland hit enter. Click on tab "Advanced" and then again "Advanced" at "Performance". In the new window again "Advanced" and then click on "Change...". You could also change the size of the pagefile if you want - however it's not recommended to do that.remove programs you don't need anymore.
So I think, this is it what you can do within windows directly without a risk, damaging your OS. To get more space you have to delete data you don't need. To find huge amount of used space, the Tool Treesize Free, mentioned above is a good go.