In fact, these deleted files can be recovered until they are overwritten with new data. If you are selling, donating, or disposing of your computer, you should safely wipe the free space on your Windows hard drive to prevent files from being restored. So how to do this? Read on to find out.

There is a built-in Windows feature that can help you wipe empty space on Windows 10. Command Prompt in Windows can be used to perform various high-level and low-level tasks via command line interface. The Cipher command permanently destroys deleted data by wiping empty space of the hard disk, SD card or other storage media.

Wipe Free Space

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Step 4. Choose the wiping method you need. You can confirm the selected or unallocated space here. Then click Start to operate the disk wiping. Safer wiping methods come with more passes and lower wiping speed.

In daily use, you can also use it to backup system for disaster and realize continuous data protection to files and folders with its Backup functions. Try it now to wipe the free space on your computer.

Sorry if i couldnt explain my problem on title. My problem is while wiping free space continuening i cancelled. But my disk space increased like 9-10 gb. Where is this file and can i delete it ? Sorry my english is kinda bad :')

Drive wipes work by filling up the 'free' parts of the disc with one or more files containing random data, (typically X's and Zeros) and then deleting that data.

That way any files that you have previously deleted get overwritten with random data, and so cannot later be recovered by recovery software.

However in your case it looks like you cancelled the wipe operation rather than there being an unexpected interruption.

So the temporary files would get deleted, (which is why WinDirStat couldn't find them), but it seems that for some reason Windows itself didn't recognise that and thought they were still there - it just took giving Windows a poke (restart) to recognise that they had gone.

TBH Wipe Free Space (and/or Drive Wiper in the Tools) should only ever be needed if you are passing on you PC or hard drive to someone else and you don't want them to be able to recover your deleted files with recovery software. (They may still be able to recover the old filenames, and possibly thumbnails of pictures, but not the original file contents).

Wiping the free space is not going to free up extra space or make your computer faster in any way.

In the options menu under the settings, i unchecked the box for wipe MFT free space. However, when I wipe free space in the tools, drive wiper menu, it always wipes the MFT free space. It takes a long time to wipe the MFT free space, which is why i want to skip this step. Any suggestions? Should I delete the program and re-install? I have a laptop with windows 7 home edition 64 bit, 8 GB RAM, intel core2 duo CPU 1.4 GHz, with Ccleaner professional v 5.63.7540.

The old original way of doing it by going into 'Options > Settings', selecting Wipe Free Space drives you have to select "Wipe MFT Free Space", it's disabled/unticked by default. Then it has to be initiated by going back to the main GUI area, selecting the Windows (tab) and then scrolling down to 'Advanced > Wipe Free Space' which can be right-clicked to start the wipe.

I have just tested this using the old origninal way of using "Wipe Free Space" with "Wipe MFT Free Space" unticked/disabled using CCleaner v5.63.7540 (newest version available) and it works how it's supposed to, i.e.; it's not using Wipe MFT Free Space. If it were wiping the MFT free space would be the first thing it does, but it isn't doing that on my system.

I think you may be confusing the two processes, which are entirely separate. Unchecking the Wipe MFT box in Options/Settings only applies when you run Wipe Free Space from Cleaner/Windows/Advanced. Using Drive Wiper will wipe the MFT whatever is in the Options/Settings box.

Ok, many thanks for the graphic explanation. I understand now that launching Wipe Free space from the different menus does different things. It may be useful for the software developers to remove the ambiguity. Specifically:

(1) When wiping free space in the CustomClean/advanced/WipeFreeSpace, it will or will not wipe MFT free space depending on the setting in Options/Settings MFT checkbox. However, will it also follow the settings in Options/Settings for the other choices (normal/secure, number of passes, alternate data streams, cluster tips)?

It's unfortunate that there is no detailed user manual for this product. However, this seems to be the norm in the software industry. The company that owns this product also sells Avast antivirus products, which I also use. However, there is no detailed user manual for this product either. Perhaps the software developers will clear up the ambiguity with the wipe free space issue in the user interface. I'm sure 99% of people using this product have no idea about this, and click options without knowing the details of their wiping operation that they selected. Maybe someone will also write a detailed user manual. It will be a good reference guide, and only needs to be written once.

2) Wiping Alternate data streams and cluster tips are irrelevant in WFS, whether using Drive Wiper or the native WFS. The action of wiping MFT records is done under the control of NTFS, but effectively the whole record is wiped, by which I mean overwritten. Wipe MFT uses a single overwrite. Normal or secure doesn't make sense, the data is being overwritten.

This option is helluva misleading in my opinion. From my standpoint, when I want only to wipe free space in MFT file instead of wasting time on actual zeroing every cluster of my hard drive, I am looking at a checkbox "Wipe only in MFT" which (or close enough) I found named as "Wipe MFT Free Space". Now I couldn't understand why would it take almost an hour to clean only MFT but I let it pass one or two last times.

This time seeing 2+ hours I had to dig deep into Internet to see that now if you choose this option it actually does the opposite of my expectation! I am quite sure that in the past many years ago I had to set checkbox to dramatically increase the speed of empty space wiping, not uncheck it.

Also it doesn't help that program doesn't tell you that it actually is zeroing every single cluster and just shows expected time instead of "Wiped XGB out of XX GB of free space". Please, consider adding a change which would tell user what actually is going on and a tip how to set it right.

P.S. Oh, the funny part is that after I unchecked that checkbox and ran Cleanup with wiping free space I see that it did not do the job because next files I copy to the drive do not get written from the first empty cluster block but instead of somewhere from the middle of empty space. Where is that simple option to quickly "wipe" free space in MFT only so that it would believe those free blocks are actually empty but not wasting time for actual unnesessary wipe of every cluster?

If you just wipe freespace without wiping the MFT then the filenames may still be recovered from the MFT but the data that was in those files can't be recovered.

If you just wipe the MFT then you won't be able to recover the filenames but could still recover the file data itself.

PS. Wiping the freespace has no function other that 'sanitising' a disc so that deleted files can't later be recovered from it.

Unless you are selling or otherwise passing the disc/computer on to someone else wiping the free space is not needed.

I run three Dell computers with the same programs and personal files. The old Dell GX620 would not complete the wipe free-space task without reporting an insufficient resource. This PC has 53805 folders, 313894 files and 195 MB MFT. The task would fail after about 2 hours running, before 50% completed, although repeated attempts (about half a dozen) eventually brought success.

The solution was to rebuild the software with a clean installation of Windows 10, loading back the programs and personal files and testing the free-space wipe at intervals. The GX620 didn't report any issues and now runs the Wipe MFT free-space in 2 minutes; a full task completes in 2 hours 5 minutes. In comparison the Dell 755 and Dell 760 running installations several years old are now returning wipe MFT times of 35 minutes and 60 minutes, respectively.

I am currently treating the installations as disposable with a rebuild required around 6 months or when the wipe task fails. It looks like an O.S. issue as though a journal is filling and not clearing...

When you delete a file in Windows rather than deleting the actual data Windows just marks the space that the file was occupying as 'free', so that another file can then be written to those blocks on your hard drive.

This means that the data from the deleted file is still there until it is overwritten by something new, and so it can sometimes be reconstructed by a recovery tool like Recuva.

What wiping free space does is to erase that old data from files that you have deleted in the past, so that it can't be recovered.

It does this by writing new files (usually just X's and zeros) into that free space and then deleting them all again - That can take a long time on large drives.

Wiping free space is typically something that you would do after deleting your files when selling, or otherwise getting rid of, a machine/drive.

You do it so that the new owner has no chance of recovering any of your old data.

As said above Wipe Free Space is included in CCleaner as an easy way that you can wipe it to prevent recovery of deleted files after you pass on your computer to a new user.

It is not intended to speed up your computer - wiping free space won't do that.

It's included twice, once as a tickbox in Custom Clean, and again on it's own in Tools as Drive Wiper.

Note that if you regularly use the tickbox in Custom Clean it will wipe the free space every time you run CCleaner.

Which means that you will have little chance (well none) of recovering deleted files yourself if you ever have the need. 5376163bf9

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