Tor Browser Error Message 0x80520015 (NS_ERROR_FILE_ACCESS_DENIED) on "New Identity" on Windows

[Lara Sond]

Dear helpdesk,

since approx. 2 weeks, my torbrowser gives the following error message (also see attachment),

"Torbutton: Unexpected error on new identity: [Exception ... "Component returned failure code: 0x80520015 (NS_ERROR_FILE_ACCESS_DENIED) [nslPrefService.savePrefFile}" nsresult: "0x80520015 (NS_ERROR_FILE_ACCESS_DENIED)" location: "JS frame :: chrome://torbutton/content/torbutton.js :: torbutton_do_new_identity :: line 1202" data: no]"

when I click "New Identity". After restarting, the Browser is then completely reset every time.
Seems to be a problem of writing to harddisk (occured never before). I checked my write permissions for the whole tor folder, seems o.k. to me.
Any idea what else might cause this behaviour?

thank you very much in advance,

Lara

[mcs]

Please answer the following questions and we will try to help.
What version of Tor Browser are you using?
What OS are you using, e.g., Windows 7 64-bit?
Does this problem disappear if you download and install a new copy of Tor Browser? (make sure it is installed in a different place than the one you are using now)

[denial]

Hello,

i have same error:

Torbutton: Unexpected error on new identity: [Exception... "Component returned failure code: 0x80520015 (NS_ERROR_FILE_ACCESS_DENIED) [nsIPrefService.savePrefFile]" nsresult: "0x80520015 (NS_ERROR_FILE_ACCESS_DENIED)" location: "JS frame :: chrome://torbutton/content/torbutton.js :: torbutton_do_new_identity :: line 1202" data: no]

when i try to create a New Identity.
However i found out, that also no settings are saved.

I'm using Windows 7 SP1 64-bit, latest patches, and latest TorBrowser 7.0.11

I deleted whole torbrowser folder and downloaded fresh installation file and installed it and same issue.
I downloaded zipped torbrowser from another computer where it works and on my computer - same issue.

I ran procmon and i think this is the related error:

13:18:42,3674148 firefox.exe 6840 SetRenameInformationFile C:\Run\Tor Browser\Browser\TorBrowser\Data\Browser\profile.default\prefs-1.js ACCESS DENIED ReplaceIfExists: True, FileName: C:\Run\Tor Browser\Browser\TorBrowser\Data\Browser\profile.default\prefs.js

This is from a working computer:

1:22:11.4822217 PM firefox.exe 3404 SetRenameInformationFile C:\Run\Tor Browser\Browser\TorBrowser\Data\Browser\profile.default\prefs-1.js SUCCESS ReplaceIfExists: True, FileName: C:\Run\Tor Browser\Browser\TorBrowser\Data\Browser\profile.default\prefs.js

Please note:
i have no antivirus, i'm logged in/running all apps as administrator, the folder is writable, the disk is not full.

Thanks.

EDIT:
I have just found out that when i disable malwarebytes antiransomware 0.9.18.807-1.1.129 ... then it is working.

​https://forums.malwarebytes.com/topic/215415-antiransome-not-compatibel-with-firefox-and-firefox-addon%C2%B4s/

[gk]

Interesting, thanks denial. I am closing this as WORKSFORME assuming Lara Sond has the same underlying problem. Please reopen if I am wrong.

[cypherpunks]

It seems we need a keyword for tickets about third-party software interference.