Hello Paul,
1.- First remove all temporarily junk with HDCleaner
http://home.tiscali.de/zdata/hdcleaner_e.htm
Read Review at MajorGeeks
2.- Have you tried going to Windows Update and checking for available updates?
Whatever you do, (installing and updateting or unistalling) always as a
administratºr.
This is the key!
The installation as an admin is not enough.
You needed to login as an Adm!n!stratºr.
3.- Can you gº to Windows Update, select Express (Get high-priority
updates), and apply all offered updªtes
http://update.microsoft.com
4.- Once that is finished, can you verify the update installs? There are
many pre-requisite files which are needed from windows update and signature
update with windows defender will fail until you hªve these f!les.
5.- Also test this WGA diagnose test, connection to MS, that scripts working
and a new Validation tool
http://www.microsoft.com/genuine/diag/
6.- Install Windows Installer 3.1 v2 (3.1.4000.2435) is availªble here:
http://support.microsoft.com/kb/893803
Locate your file msi.dll (with search if you are
not sure where it's located) and confirm what the version is, either from
it's properties or just passing your cursor over it. If it's not the
latest which is 3.1.4000.2435, then:
http://support.microsoft.com/kb/893803/
7.- I'd recommend re-downloading, and saving to a known location--like the
desktop.
After the download is complete, disable real-time protection by your
antivirus for long enough to do the installation. please disable or turn off
as much other software that always runs as you can--real time antivirus
scanning, any other antispyware software, (Stop all programs that are open in
the bottom taskbar) etc.
I hope this post is helpful, let us know how it works ºut.
Еиçеl