http://forum.zive.cz/viewtopic.php?f=1864&t=109484 3
http://www.ghacks.net/2010/03/04/how-i-freed-up-12 -gigabytes-of-hard-disk-space-in-windows-7/
http://www.ghacks.net/2011/02/23/remove-windows-7- sp1-backups-to-free-up-disk-space/ - odstranit Backup servicepacku...
http://www.howtogeek.com/howto/44317/should-you-de lete-windows-7-service-pack-backup-files-to-save-s pace/

Možná smazat: C:\Windows\SoftwareDistribution
The folder SoftwareDistribution stores the Windows/Microsoft Update information including the downloaded and already installed updates. In time this folder will become larger and larger as a result of many updates. Although this information is not that important, it is not that easy to empty this folder. Before deleting the folder SoftwareDistribution, it is necessary to stop the service Windows Update first (right click the service and select Stop, for more information visit the page about optimizing the Windows services). After a few seconds the whole folder C:\Windows\SoftwareDistribution (subfolders included) can be deleted, followed by a restart of the service (or a restart of Windows). After the service is active again, this folder is recreated. Because the update history and settings are gone, start Windows update to make sure the update procedure still works fine. To upgrade Windows update to Microsoft Update, to receive updates of more Microsoft products, click the task Change settings and activate the option Give me updates for Microsoft products and check for new optional Microsoft software when I update Windows. Be aware that this procedure solves many Windows Update-problems!