I am using Windows 7 and one time I had to reinstall it.
I reformatted the drive but it tells me that the drive can’t be formatted
because there is an operating system on the drive, so I re-install over the old
OS but during the installation process, it informs me that the installation
will backup the current OS in a folder called “windows.old”! I install
correctly and everything works normally. I thought formatting was supposed to
wipe the drive so a fresh install could happen, but windows won’t let me delete
the entire “windows.old” folder – apparently there is something in it that is
system sensitive and off limits.
My question is, why does the new install create that “windows.old” folder
and if it is safe to get rid of it(I understand it is!), how do I manage
that?
A reinstall of Windows should allow you to reformat the drive. It may
warn you that there’s an operating system already on the drive – as it
should – but ultimately you should still be able to indicate that you know what
you’re doing, and that the drive should be erased.
If you bypass that and install without the reformat – as apparently you have
– Windows setup basically tries to be helpful by saving the prior
installation.
Getting rid of it, if that’s what you want, should be fairly
easy.
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Alternately you can also fire up a Windows Command prompt using a similar sequence, and enter the following commands (highlighted in bold):
C:\Users\LeoN> CD \
C:\> RD /s Windows.old
BE CAREFUL: make sure that it’s Windows.old you’re deleting, and not Windows itself.
That could have you starting the whole installation over again, from scratch.
Leo,
Thank you for your quick reply and explanation.
My mistake was that I, like an idiot, was trying to reformat the C drive FROM the C drive, and naturally, I couldn’t so it created the “windows.old” folder to protect itself!
However, unless I have missed something in your reply pointing the way, I don’t understand how to format the OS drive from WITHIN Windows itself that would eliminate going through this loop.
I resolved the question by simply re-installing the OS anyway and then using disk cleanup after the fact and it simply eliminated the folder – indicating Windows found no vital files in that backup folder that would make the new installation unstable if eliminated.
Problem solved – I love Windows 7
07-May-2010
Whenever I reinstall I leave windows.old for a week just in case there is anything I may have missed when I backed up. I’ve never need it because all I needed was on the backup, but if you didn’t back up there are a few things you can manually recover from windows.old such ad t-bird account settings, address book and emails. Browser shortcuts and saved passwords etc. I’ve used may backups to get these back but I’m on of the paranoid (It’s not really paranoia there really are bots out there after your data, not to mention my own mistakes and natural disasters) ones who backs up my backups. On my first programming job the boss was required to have one of the 3 backup disks at home home and that copy could never be more than 3 days old.
Windows.old is simply a backup of what’s currently on your hard drive at the time when Windows 7 installs, but don’t rely on it to save everything, mistakes do happen. What I’ve done in the past and highly recommend is create a partition using most of your current ‘free space’ and install Windows 7 there. By default this new (with Windows 7) partition should become Drive ‘C’, then you can delete your original partition once you’re sure you’ve retrieved any files you may want. (Also, you can ‘drag and drop’ any files you want from the ‘old’ drive to the new ‘C’ drive this way). Just a suggestion, but I always use ‘Treesize Free’ to go through the old drive to make sure I’ve recovered anything I may want.
One step noted above was to rename the folder and see if that causes later problems. This is a very neat and effective method for making certain one can safely delete a file/folder. I have explained this to my clients who have many computers and they want to know if something is safe to delete. There is no uninstall, so I have them rename the file or folder, usually just adding an “_x” to the end. Then operate for a while to see if anything bad happens or they get error msgs. If not, probably safe to delete.
Windows.Old can be deleted by right clicking the drive it’s on, probably C:, click on Disk Cleanup then click on Clean System Files.
That should do the trick.
I personally like the notion of windows.old simply because it provides that extra measure of assurance that something might be there that I missed during my pre-installation back up. On both occasions when I upgraded to Win 7, I managed to review the .old folders and delete both without a problem…simply right click and delete. I remember reading Microsoft literature stating that this was doable, so I did this successfully.
Further to the above, the windows.old folder saved me time from reloading personal files (music, photos, movies, docs) from the old OS to the new one. I didn’t think these files needed to be removed completely in particular for them to work any better on the new OS via back-up.
I have recently upgraded from Vista to Win 7 and want to delete old windows files. How do I determine what files are in the old windows OS and what are not so that I don’t delete the files that I want. Thank you.
Well, I have the computer backed up and everything and I’m pretty sure Windows.old isn’t running anything, if it is it is unseen but the computer fails to delete the folder on the cmd prompt saying if I was sure, and after saying yes or Y to the cmd prompt it said that the folder was not found and I could see it in the c: drive… am I doing something wrong?
@Gabby
Unlocker Assistant often helps in situations like that.