In Windows Vista shows in Disk Cleanup listed items below have huge GB file sizes, for the following Lists.
Per user archived Windows Error Reporting Files
Per user queued Windows Error Reporting Files
System archived Windows Error Reporting Files
System queued Windows Error Reporting Files

WARNING:
If you click Delete these listed items in Disk Cleanup without fixing this bug first will cause removal of working files in windows and you have to reinstall Vista.

Fix for Disk Cleanup Windows Error Reporting Windows Vista x86 (32bit)

Download Fix_DiskCleanup_Error_Reporting.reg file.

Click on Save, and save the file to the Desktop.

Right click on the file(on Desktop) and click Extract then run fix.reg file.

Click on Continue (UAC), Yes, and then OK when prompted.

When done, you can delete the files from Desktop

Relogin, or restart the computer to apply the changes.

NOTE: The Disk Cleanup shortcut is correct in the 32 bit Vista.

If you have the 64 bit Vista, then you will also need to fix the Disk Cleanup shortcut only.

Fix for Disk Cleanup Windows Error Reporting Windows Vista x64 (64bit)

Open the Start Menu.

Click on All Programs, Accessories, and then on System Tools.

Right click on Disk Cleanup and click on Properties.

NOTE: All other Disk Cleanup shortcuts are correct in(x64). Just this one has incorrect parameter.

In the Target: area, change it from:
%SystemRoot%\SysWOW64\cleanmgr.exe
TO:
%SystemRoot%\system32\cleanmgr.exe

Click on Apply for changes

Click on Continue in the Access Denied and for UAC prompt.

Click on OK.

This tip will show you how to create an unattended disk cleanup which will also empty your prefetch folder. This tip assumes you have Windows XP installed in c:\windows.

Step 1.
Create a new text file and place the following contents inside:

c:\windows\system32\cleanmgr.exe /dc /sageset: 1
c:
cd \
cd c:\windows\prefetch
del *.* /q
(more…)

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In previous versions of Windows, you would find a built in utility called ScanDisk. This utility exists in Windows XP but is called the Error Checking utility. So, in addition to running Disk Cleanup and Disk Defragmenter to optimize the performance of your computer, you can check the integrity of the files stored on your hard disk by running the Error Checking utility.

As you use your hard drive, it can develop bad sectors. Bad sectors slow down hard disk performance and sometimes make data writing (such as file saving) difficult, or even impossible. The Error Checking utility scans the hard drive for bad sectors, and scans for file system errors to see whether certain files or folders are misplaced. (more…)

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