Don't want to be stopped by such "antivirus error 8504 and 101" error message while you are trying to use your program next time. Luckily, the methods to resolve the norton problem shouldn't prove to be difficult to execute and you can try all them one by one. If the norton problem still can't be fixed by manual methods, you can scan and repair the issues by using the automatic repair tool below.
One way to update Windows 7 - To turn on automatic updates in Windows 7:
1.Select the Start button
2.In the search box, enter Update, and then, in the list of results, select Windows Update.
3.In the left pane, select Change settings, and then under Important updates, select Install updates automatically (recommended).
4.Under Recommended updates, select the Give me recommended updates the same way I receive important updates check box, and then select OK.
5.Reboot your computer after you have done all these steps.
6.Voila! Windows will install updates automatically by itself and there is no need to keep an eye on it any more.
Process Explorer is a system tool from Microsoft and works on Windows 7, an advanced tool which can show processes name, program data, description, image, processer name, etc. Have a try with Process Explorer; for example, use it to kill a program process.
1.Download Process Explorer.
2.Open process explorer, the main window looks like below, there are 2 parts, left side is processes list, and the details are listed on right side.
3.You can check system information by clicking View > System Information.
4.You can kill process by right click on related process name, select Kill Process.