Tens, hundreds, even thousands of attempts are made upon your computer every hour! No operating system [Windows, Linux, Apple] is perfect. Hackers 'test' the operating systems every day, looking for vulnerabilities. Each week, and sometimes on a daily basis, certain 'holes' in the OS must be repaired, to prevent the hackers from breaking in.
Windows Update is one such service to the windows user. It is very, VERY, important to the security of your PC to set your computer to automatic updates [recommended]. Or, visit www.windowsupdate.com Weekly.
Finally, do not ignore update alerts from other software like Java and Adobe®. Many forms of Malware 'sneak' in to your PC through 'holes' which are 'patched' by these updates.Windows Update
Click Start -> Control Panel -> Performance and Maintenance -> System -> Automatic Updates tab
Click Start -> Control Panel -> System and Maintenance -> Windows Update -> Turn automatic updating on/off
Click Start -> Control Panel -> System and Security -> Windows Update -> Turn automatic updating on/off
Click Start -> Settings -> Update & Security
sc stop wuauserv cd /d %windir% rmdir /s /q softwaredistribution sc start wuauserv
regsvr32 /s wuapi.dll regsvr32 /s wuaueng1.dll regsvr32 /s wuaueng.dll regsvr32 /s wucltui.dll regsvr32 /s wups2.dll regsvr32 /s wups.dll regsvr32 /s wuweb.dll
Tip: Copy commands into text file and save as fix.bat. Then run the file!