2. Check whether the installed antivirus software or security guards affect the download.
3. Delete the history and have a look at cooking.
4. Open the Security panel, click Custom Level to enable all downloaded options, and then click OK. Then click the "Advanced" column in the Internet options, find the "Security" column, and check "Check the signature of the downloaded program". Further down, "software is allowed to run or install, even if the signature is invalid." Hook it. Click OK to save.
1. First, we can check the permissions of the current user. Only administrators can operate at this time, but ordinary users can't.
2. Then we need to check whether the service on Windows Installer is normal. If it is not normal, we need to proceed to the next step.
3. After that, we need to check the startup items of the computer, if there is any problem, delete something we don't know, and then restart the computer.
Finally, in the user management center of the computer, we need to re-establish an administrator user, sometimes some of our user attributes will be lost, resulting in many functions can not be used normally.