@leocg & @burnout426 i checked permission to write and i can..

btw right clicked the file - windows reported - SHA256: C7F37633D09BC7FA61A03E4807622EB4EC474F36F40A5782652AEDBF8CC15CB7

number do match (in reference to your post burnout), even tho its all Caps..

have not cleaned the %Temp and stuff..

i never could get the offline installer (Opera_Developer_67.0.3554.0_Setup_x64.exe)

to install the Option (USB) to the directory -
(C:\Portable\Browsers\Opera developer)
it kept tryna go online to download the (Full Package).. as the opera log file showed.. lol

Note - the offline exe already has the (full Psckage) Built-in so there was no need to d/l..

Note - when do 'n the Option (USB) it only suppost to Extract the files - to the Directory of your Choice.. esp. if your not online to begin with..

So to make it more interesting !..

i re-done install again after a re-boot And this time - while being online..

Note - wanna to see if firewall stops the attempted Connection of the offline exe to d/l the (full Package) or if it does complete the d/l ! lol

Firewall stopped it again ! !..

n e ways am pleased to say that the
(Opera_Developer_67.0.3564.0_Setup_x64.exe)

installed the Option (USB) Sucessfully !..

to the (questionable?) directory of
(C:\Portable\Browsers\Opera developer)..

use 'n the same steps (1/2/3) same (precedure) as stated in the prior posts above..

Note - no doubt the offline file (Opera_Developer_67.0.3554.0_Setup_x64.exe) was a bad file 4 me even tho the (SHA-256) matched..

Also i insatalled the new 66 stable in a different directory Too !..

Ok Now - since the (Opera_Developer_67.0.3554.0_Setup_x64.exe)

Was too damn sneaky ! *seriously..

i'v made a few more Firewall Rules for the Opera Stable 66

Outbound rules & inbound rules even tho Windows Firewall suppost to take care Inbound..

here is pics..

Inbound

Outbound

rules are work 'n gr8 ! gunna do dev next..

only bad thing.. Seriously - is when their 's a new opera then the firewall rulez will need to be done over..

You could right-click on the "Browses" folder and check the security to make sure the account in question has write permissions.

will try in a while thankyou again for post 'n that !..

am tryna explain like this to you and burnout..

step 1 - ok i made a directory called : C:\Portable\Browsers\Opera developer

step 2 - installed this file called - (Opera_Developer_67.0.3541.0_Setup_x64.exe)

from here - (https://blogs.opera.com/desktop/) the file is on right side of the blog page..

step 3 - used the USB option.. and - installed in a folder called - (C:\Portable\Browsers\Opera developer)

no problem, works like all previous versions (same procedure)

here is a pic of the work 'n directory of Opera 's Dev 67.0.3541.0 portable 64 bit..

ok Now here comes the Weird Part.. lol

if i delete the directory C:\Portable\Browsers\Opera developer)

and install (Opera_Developer_67.0.3554.0_Setup_x64.exe)

and use the same directory and procedure for the install (as stated above - step 1/2/3}

i get this error.. tryna to install Portable 64 Opera dev 67.0.3554.0

i never have had this error before do'n the same procedures with previous versions (dev or stable)..

Here what i did lately to install the newest dev..

if i delete the directory - (C:\Portable\Browsers\Opera developer) - it gives that error thingy..

so i re - installed (67.0.3541.0)

use 'n same directory (C:\Portable\Browsers\Opera developer)

then installed (67.0.3554.0) on top..
pic looks like this..

a button for Upgrade.. lol

both version folders are there !.. and it works..

i do not understand why it works do 'n it that way and not work the other way.. n e ways am gonna delete it..

Do not trust after it tried to connect as soon as i began install, for sumthing the setup file aready had..

it just soppost to Extract not Download n e thing !..

too damn sneaky opera !..

@burnout426 - to your post i took a look @ temp files and their're loads of them.. gunna Wait till the next version and see how it goes.. lol

im clean sum of that mess up..

but i believe next verson will work right for mee (hopeful..

all other versions install ok except that one.. n e other time opera would've had 1 ready to go.. lol

the test ya did i assume you did the usb standalone Portable..

I clicked "options" in the installer, set "install path" to a new folder on my desktop and set "install for" to "Stand-alone installation USB", and installed. It worked fine even when disconnected from the net. I tried upgrading a standalone installation while disconnected from the net also. Worked fine there too.

I didn't try the "Opera Portable USB" download from https://www.opera.com/download though as that's a net installer and does require a net connection.

found log file.. here is the last few lines of it..

I'd guess that you need to clear all Opera folders and files from "%TEMP%", "%windir%\temp" and the folder your downloaded the installer to. That should fix things.

[0107/104457.023:INFO:wininet_impl.cc(795)] Attempting download resume
[0107/104457.027:WARNING:wininet_impl.cc(542)] Request completed with an error indicating connectivity issues: 12029
[0107/104457.027:ERROR:wininet_impl.cc(893)] Number of retries exceeded, last error: 12029
[0107/104457.027:ERROR:wininet_impl.cc(824)] Download failed
[0107/104457.028:ERROR:pref_default_overrides_fetcher.cc(66)] Failed fetching default prefs overrides
[0107/104615.151:ERROR:installer_controller.cc(302)] Installer error: Unreported installer error.
[0107/104615.151:INFO:main_process_installer_runner_impl.cc(232)] Stopping installer backend (if running)
[0107/104615.152:ERROR:installer_ui_controller.cc(277)] Unreported installer error.
[0107/104615.253:INFO:installer_ui_controller.cc(340)] Handling pending error
[0107/104615.253:INFO:root_screen.cc(223)] Displaying error: "An error occurred while attempting to install Opera!" and don't offer full package

as you can see here @ the 1st couple of lines..

[0107/104451.018:INFO:wininet_impl.cc(327)] Starting download from https://autoupdate.geo.opera.com/api/prefs/?product=Opera&version=67.0.3554.0

It wanna d/l the (full package)

ok i did a 7zip extract to see if the (full package) is built in the offline file.. as ya can see Directory is not in order..

i had to make the 67.0.3541.0 Folder..

then drag/drop everything else where the files and folders need to be..

when i was done.. i clicked launcher exe and is work 'n great ! lol

so (full package) is built in and does not need to be d/l.. lol

bottom line - sumthing about the offline file is not work 'n like it should..

if so try installing w/o internet lol for sum reason it trys to connect to get the package part.. lol

probaly when ya tested ya was online..

once you d/l the offline Setup_x64.exe it should be good to go w/o internet..

i think its messed up and trys a online setup.. lol

here is error pic

gunna look for log file to see that what i'm say 'n is right..

Same thing goes for the link on the desktop team blog.

Do you still have the problem?

one other thing - it does Create the folder (Opera developer) in the folder you chose at options but no other files or folders like - profile, dev version folder, ect.. - example C:\ Browser\Opera developer - nothing else is installed

the offline from the ftp - same problem

Note : offline 64 setup exe for Dev 67.0.3541.0 works fine less than 7 sec to install on hard drv..