Hello.  I am using an XP system.  My PROBLEM is that drive C (originally 1.94GB) is now down to 44.2 MB.  I keep getting these messages to clean up.  I have cleaned up al the internet pages, temporary files, and other things that are suggested.  When I go to the "program" section, to uninstall unused program there is nothing there extra.  It recently got clogged up like this (before there was close to 200MB free, after I opted for automatic downloads.  I looked at my files for C but I didn't see anything extra either.  Just my printer is there along withmy system files and program files, the stuff you get when you download XP.
  I do have some room on my D--425MB.  
Question: What can I do to create more room on my C? Can I get rid of those updates safely? Can I transfer any program files or things from C to D? Can anyone come online through remote assistance and take a look at what is clogging things up like this?
 Please, don't suggest that I upgrade or buy anything. I'm working on a budget and can't afford anything right now.
Thanks. Dr. JRun Disk Cleanup and remove all but the LAST restore point. See if System Restore is turned off and if Recycle Bin size is set at a reasonable level on each drive.

Reduce the IE Temporary Internet Files cache and History cache to the minimum. Unhide all files and folders and remove the hotfix uninstallers ( $NTUninstaller$ ) from the hidden C:\Windows folder and remove their entries from Add-Remove programs. Then
remove the contents of the C:\WINDOWS\Downloaded Installations folder, the C: WINDOWS\SoftwareDistribution\Download folder, the C:\WINDOWS\Temp folder, the C:\Windows\pchealth\Datacoll folder, and the C:\Windows\Prefetch folder and turn off prefetching.

Install CCLeaner and clean out all of the junk files.  Then run chkdsk and defrag.Using windows explorer and windows find do this:

Set SHOW hidden folders and system folders within the options menu in EXPLORER.

Go to c:\windows

1) look for all the BLUE folders starting with "$"
example $MSI31Uninstall_KB893803v2$
select all these and DELETE. Even delete the SP1 folder.

2) Empty the C:\WINDOWS\TEMP folder.
3) Empty the C:\Documents and Settings\user01\Local Settings\TEMP
4) Using the Windows FIND (F3) command enter the next search string:  *.tmp *.old *.bak *.gid *.dmp *.~* ~*.* *.*~

The above string will find additional garbage. Selectively delete files in the search result

5) Sometime if you have MULTIPLE user accounts, there are recycle bins from other users that are usually not emptied.

Go to C:\RECYCLE (hidden folder) and delete anything there holding the SHIFT DEL keys (permanent delete) Administrator only can do this...
Move the Windows swap file to another partition/Hard Disk Drive.  I tried some of the things you guys said.  Some of the other things, I, well, couldn't figure out how to do them.  Like I couldn't find the swap files (I asked search but they came up with nothing for swap files) to move them to D.  And I couldn't find any blue files that began with $ .  And I don't know what F3, Find it.  So, maybe I'm just too. . . .
  Anway, if you can tell me more simply what to do, that would be great.  And, what about all that space on D, can't that help in any way?  I need to download PowerPoint for use in a CLASS I'm teaching soon.  Can I put that, at least on D when the rest of my Office is on E (which is also nearly filled). Thankshttp://support.microsoft.com/?kbid=309000

or even this>>http://www.microsoft.com/windowsxp/using/setup/expert/crawford_november12.mspx