windows xp's certification is not available in windows 7
Description: I encrypted aword filewith EFS in windows xp, thenI exported the certification. I installed a windows 7 and imported the certification,but I still can't open that file . I don't know wheather it happened to the others.Does anyone have a good idea to solve this problem? Thank a million ! cooler
February 11th, 2009 7:33pm

Have you 'taken ownership' of the file or folder?Home Editions do not see the Security tab of files unless you run as the default "Administrator"Rating posts helps other users Mark L. Ferguson MS-MVP
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February 11th, 2009 8:44pm

the version of windows xp is professional service pack3!what do you mean the "owenership"? I have given the "full control " permission to the user! Any other suggestions? cooler
February 12th, 2009 4:07am

Did you export with the private key? If not, the cert is not useful.Ned Pyle [MSFT] - MS Enterprise Platforms Support - Beta Team
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February 12th, 2009 6:03am

Yes,I exported the certification with the private key. (the .pfx file with password)anything else? cooler
February 12th, 2009 10:21am

Anyone would like to do this kind of experiment to verify ? I don't know wheather it's a problem or something is wrong with my operations!cooler
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February 12th, 2009 10:56am

I'll try a repro on this tomorrow. Was the EFS certificate self-signed or issued by a Certificate Authority? Also, how are you accessing the encrypted file - over the network? Did you somehow get it onto the Win7 computer in an encrypted form using a raw copy tool? Ned Pyle [MSFT] - MS Enterprise Platforms Support - Beta Team
February 13th, 2009 8:39am

I installed a windows xp and encrypted the files of drive d. Then I reinstalled the windows7 and tried to access it.cooler
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February 14th, 2009 4:37am

same issue here..
March 16th, 2009 7:09pm

The main idea behind encrypting files is high security. It is expected that an encrypted file from one OS installation will not open or work in another, that is the whole idea behind encrypting files. The average user probably never has the need to use this feature, unless they are overly paranoid about people reading their chat logs .. :P What you need to do, is decrypt the file, then save it to a flash key or put it on a CD and it will work just fine in the other OS. even dual booting from a security perspective is seen as two separate computers. Windows is primarily a business operating system, not designed for home users, but rather designed for business and accepted for use as a home tool. The idea of exporting and importing keys is all well, but in my experience it often fails to work for some highly annoying reason. The simple solution is that if the data is not secure enough to move off the PC, do not encrypt it. A better solution is decrypt it THEN move or copy it off the source machine. If you plan ahead, you can avoid 95% of these types of problemsComputer software consultant for 27 years
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May 7th, 2009 11:22pm

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