The newly installed win7, downloaded the latest unity hub and the latest unity2021.3.5fl (stable version) from the official website of unity.
First: authentication activation failure problem
The two software can be installed normally in the early stage, but when you click on unity, a window of unity uncertified will pop up, so you will enter the unity hub for activation and certification.
Question: I first chose to perform automatic activation authentication on the unity hub, but the authentication interface waited for a long time, and finally an error similar to network failure popped up. After trying many times, it is determined that it cannot be activated automatically.
Then choose manual activation: But in the first step, saving the .alf file failed, and it also failed after many attempts.
In response to the above two problems: I downloaded the old version of unity hub from the official website of unity, and successfully activated the authentication.
Second: unity package manager error problem
After the above certification activation is completed, I create a new project, but the new project cannot be opened in unity, and the unity package manager error is displayed.
After I turned off the win7 firewall and defender, the above error was still displayed. Afterwards, Diagnostics analysis shows a udp failure problem. Then perform a Baidu search method. It was found that UnityPackageManager.exe could not be started. After clicking the software, an error popped up: the program input point EventSetInformation could not be located on the dynamic link library ADVAPI32.dll.
This is because the computer lacks ADVAPI32.dll, that is, the kb3080149 system upgrade patch is missing. After downloading and installing the kb3080149 patch, unity works normally, and the new unity project is successfully opened.
Analysis: The newly installed win7 lacks various upgrade patches, which causes unity to fail to work normally, and the unity package manager error appears. The inability to activate the certification and save the certification file on the unity hub is probably the reason why the system patch is not applied. So install the missing patch on win7.