QT install error

[artwaw]

@FBF-One On Windows the files are first downloaded into the system %TEMP% directory, which is usually placed in the user space on C: - so you need some space for the downloads on C: too.

When you write stopped working - what exactly do you mean? What error/erratic behaviour do you get?

[FBF One]

@artwaw so I can only install it on C:\ drive and can't install it on D:\ or E:\ drive...is that so?

[artwaw]

@FBF-One No, you're most welcome to install wherever you wish. Just the way system works, during the download temporary files are created and grow as the download progresses. Once all is downloaded those files are expanded (decompressed) into the folder of your choice.
Internally Qt Maintenance Tool uses 7z to compress the packages, so the temporary space on the C: drive that is required is much less than the target size requirement - but it is required.

Of course - since you did not provide any meaningful error description - space requirement might not be a problem here at all. I mentioned it as it is the most common one when people report issues with download and install on the non-system drive.

[FBF One]

@artwaw I installed it on C:\ drive(Selected by QT) and still got the error

[artwaw]

@FBF-One Can you try this version please? https://download.qt.io/official_releases/online_installers/qt-unified-windows-x86-online.exe

[FBF One]

@artwaw still get that error

[artwaw]

@FBF-One Do you have any antivirus or other protection that could interfere?

Other thing to try is to head down to Windows logs (can be found in the one of the system snap-ins in the start menu - unfortunately I don't have Windows 10 which you seem to be running, right?) and there search for the installer related entries. It should have an error/crash entry with more details.

[FBF One]

@artwaw
I've searched the log but there doesn't seem to be any useful information

Log Name:      Application
Source:        Application Error
Date:          25/11/2021 7:09:53 CH
Event ID:      1000
Task Category: (100)
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      Admin
Description:
Faulting application name: qt-unified-windows-x86-4.2.0-online.exe, version: 4.2.0.0, time stamp: 0x61891975
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x00000000
Faulting process id: 0xd0094
Faulting application start time: 0x01d7e1f51a0c676b
Faulting application path: E:\qt-unified-windows-x86-4.2.0-online.exe
Faulting module path: unknown
Report Id: e6f3a010-737b-4fd9-a985-8386801c7a19
Faulting package full name: 
Faulting package-relative application ID: 
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Application Error" />
    <EventID Qualifiers="0">1000</EventID>
    <Version>0</Version>
    <Level>2</Level>
    <Task>100</Task>
    <Opcode>0</Opcode>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2021-11-25T12:09:53.9600961Z" />
    <EventRecordID>51843</EventRecordID>
    <Correlation />
    <Execution ProcessID="0" ThreadID="0" />
    <Channel>Application</Channel>
    <Computer>Admin</Computer>
    <Security />
  </System>
  <EventData>
    <Data>qt-unified-windows-x86-4.2.0-online.exe</Data>
    <Data>4.2.0.0</Data>
    <Data>61891975</Data>
    <Data>unknown</Data>
    <Data>0.0.0.0</Data>
    <Data>00000000</Data>
    <Data>c0000005</Data>
    <Data>00000000</Data>
    <Data>d0094</Data>
    <Data>01d7e1f51a0c676b</Data>
    <Data>E:\qt-unified-windows-x86-4.2.0-online.exe</Data>
    <Data>unknown</Data>
    <Data>e6f3a010-737b-4fd9-a985-8386801c7a19</Data>
    <Data>
    </Data>
    <Data>
    </Data>
  </EventData>
</Event>

[artwaw]

@FBF-One Do you experience crash of other programs too? From what is written in that event note you can extract exception code.

I found related entries in the Windows help forum https://answers.microsoft.com/en-us/windows/forum/all/exception-code-0xc0000005-crash-to-desktop-in/a4f3d828-823a-41d0-a45d-9e8cd0c19796

EDIT: in general something interferes with running Qt Installer. This can be legitimate antivirus, this can be malware, this can be hardware fault.

[jsulm]

@FBF-One said in QT install error:

and it takes more than 20GB

You probably selected more Qt flavors than you need.
There are different Qt builds for different platforms, like Windows (MinGW and different MSVC versions), Android, ...
You should only select what you really need to not to waste space on your drive.

[deleted385]

For Desktop app, these are the only things I'd selected:

no additional libraries. It took ~1.35GB in my case and a few minutes to install.