If you can’t connect to the Internet, browse the webpages, or the connection speed is very slow, certain websites don’t load up, or face frequent browser crashes when using Internet Explorer, you are indeed running in problems. Script or certificate errors are also among these Internet connectivity/browsing issues. Check the steps given below and fix these issues to connect to and browse the Internet properly in your Windows Vista PC:
1. Open Internet Explorer> click on Tools> and select Internet Options. Click on the Advanced tab and scroll down to the option ‘Use TLS 1.0’. Uncheck the box next to the option and click on OK to close the window. This will resolve the security certificate error.
2. Open Internet Explorer> click Tools> Manage Add-ons. Disable whichever add-ons you want to. Click Apply and then OK to exit the window. Check which add-on is causing the problem and remove it to make your browser work properly. (See Also why Internet Explorer can't download files)
3. Close all the windows currently opened on your desktop. Open Internet Explorer> click on the Tools tab> choose Internet Options> click the Advanced tab> and click Reset. On the Reset Internet Explorer Settings window, click the Reset button. When IE is done applying the default settings, click Close, click OK, and then again click OK to close the window. Close and re-open Internet Explorer to let the changes take effect.4. Run Windows Updates to download and install any updates for Internet Explorer. It will help correct problems related to outdated files and vulnerabilities that are causing your browser to crash, hang, or malfunction frequently. (See Also how to remove Internet Explorer Content Advisor Password)