C drive running out of space

- delete obsolete user accounts, temp files, temporary internet files, log files uninstall useless programs add-ins)

- move your %temp% to another drive (Right-Click on My-Computer - Manage - Advanced - Environment Variables and change the variables TEMP and TMP for the User and for System)

- Move to another drive (Right-Click on My-Documents - properties, change the target)

- Move the Pagefile.sys to another drive (Right-Click on My-Computer - Manage - Advanced - Performance Settings - Advanced - change, define on your second drive whatever was defined on your C drive, and set your C drive to 64-64 or so)

- If like me you have never uninstalled a Microsoft update and are not planning to do so, delete Microsoft Updates uninstall information, C:\windows\$NtUninstallKB933729$, you could very well have a few hundreds of these.

- While you are at it you can also remove the Windows service pack installation files, C:\Windows\ServicePackFiles and uninstallation files C:\Windows\$NtServicePackUninstall$

- Clear *.Log under c:\windows c:\windows\system32\logfiles

- uninstall from c:\windows\Downloaded Program Files

- Clear C:\windows\Downloaded Installations