c:\windows\system32\msiexec.exe is open or in use fix

When i recently tried to install some 3rd party programs i encounter this message, is there a problem with my exe? Also i cannot update Silverlight, Microsoft .NET Framework 2.0 Service Pack 2 Security Update[ Windows 2000, Windows Server 2003, and Windows XP (KB974417)], Update for Microsoft XML Core Services 4.0 Service Pack 2 (KB973688).

Can someone give me a solution to this..?

Im using windows xp sp3 in an acer netbook with avg8.5

Please navigate to this webpage: http://support.microsoft.com/kb/313222 and see the section "Fix it for me" and click the Microsoft Fix-It button. This will download a fix utility to repair the security settings on your computer, due to damages of malware or other harmful system changes. Install the file after download.

Then try it.