Hi Christian
You may deleted these Folders maually. However, if you are not on really low
HDD space, I would not recommend it.
Once you have uninstalled those Folders, you will not be able to remove the
respective Service Pack and the respective Hotfixes. If you are sure you
will never want to do that, you can safely delete them.
For additional Information, you might want to read this MS KB-Article as
well:
- "HOW TO: Remove the Service Pack Restore Files and Folders in Windows":
http://support.microsoft.com/default.aspx?scid=kb;en-us;290402
Hope this helps. Regards,
Fabio