The above Microsoft office 365/2021/2019 installation Error code 30182-1015(4) primarily appears when you try to open Office 365,Office 2021,Office 2019,Installation program on a Windows 11,Windows 10 computers . It has been observed that this Error code 30182-1015(4) needs to repair or a reinstall and you can read the below information for more knowledge.
Disclaimers: Before you attempt to fix the Microsoft office issue, we highly recommend taking a registry back up and set a system to restore point. Because this process involves repair on registry and changes. In case if something goes wrong during this process, we can revert back the settings and we can do a system restore? Also, save your documents, emails, spreadsheets, and office related files and back It up.
(In case if you not sure how to back up, consult the Experts to help you)

Solutions to fix Microsoft Office 365/2021/2019 Installation Error Code 30182-1015 (4)
How to do disc-cleanup:-
Method-1 Creating shortcut
Meanwhile, watch this video to follow above steps for a disc cleanup.
Method-2:
It takes sometime if the computer have too many junk files to cleanup.
1. The first attempt is to check if there is any previously installed office 365 installation program with the same version.
That needs to be removed and then the office 365/2019 installation program should be commenced from the beginning.
2. If we don’t see any previously installed similar office 365/2021 programs, it is recommended to run a network check through command line.
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The command prompt should be opened using the administrative permissions and then network command which needs to be executed as follows.
Nslookup office365.com
Irrespective of the version of your Microsoft office installation program, it is a very common line to check the status of your previously installed office program.
The server name should not show you as unknown.
3. If the server name is show as unknown, restart your router or the modem and execute the same steps again.
4. If the server check passes correctly, then use the other setup file which is related to 64 bit from advanced steps under office setup file.
5. If the office 365/2021 Error code 30182-1015(4) , still appears after the office installation, attempt to repair the office installation programs.
6. If the Microsoft Office repair fails again with some Microsoft office 2021 Error code 30182-1015(4) , a re installation of office program is required.
7. If the Microsoft Office repair succeeds and you still see the same office installation Error code 30182-1015(4), then perform a system file scan on your windows using the following steps.
How to do a SFC Scan:-
Finally,
In Conclusion,
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