The following article displays how much space you can gain by freeing up some space on C:\ drive by deleting or moving the files/folders.
1. C:\Windows\Temp
2. C:\Windows\$NtUninstallKBxxxx
3. C:\Winnt\DllCache
Note: SFC and WFP uses to restore corrupted System ModulesCan be moved to some drive and using Registry we can set the DllCache location in another drive. So when next time WFP runs it searches for DllCache folder on drive specified in registry.
4. C:\Winnt\Help
5. C:\Winnt\INF
6. C:\Documents and Settings\Users
7. C:\CMDCons
8. C:\Winnt\Memory.dmp
9. C:\Winnt\LogFiles
10.C:\I386
11.C:\Program Files\Support Tools
12.C:\Winnt\Driver Cache
13.C:\Winnt\Driver Cache\Driver.cab
14.C:\Winnt\Installer
15.C:\Winnt\Media
16.C:\Winnt\Repair
17.C:\Winnt\Security
18.C:\Winnt\System32\Clients
19.C:\Winnt\System32\Adminpak.msi
20.C:\Pagefile.sys
21.C:\Winnt\ *.MSI files
I will shout more if I have something more to add in here…