Are you asking about 360 browser always stuck at 99%? The specific steps are as follows:

1. First open the browser, and then click Tools-Internet Options on the menu bar.

2. Then in the pop-up dialog box, switch to the Advanced tab, uncheck Check the signature of the downloaded program, and check the check box to allow the software to be run or installed even if the signature is invalid.

3. Then click the Settings button in Browsing History under the General tab.

4. Select Automatic in the settings dialog box that pops up, and then you can clear the temporary files, change the storage location of the temporary files, and click the OK button.