I have Windows Vista Home Premium SP1 on my desktop computer which has 3Gb of RAM and Windows Update continues to nag me that I need to upgrade to SP2.

I have tried to do so over and over again but every time it fails and I get the error message "ERROR_ACCESS_DENIED (0X80070005)".

Now from my research I gather this error message is telling me that I am trying to install SP2 without sufficient privilidges but I am actually logged in as an Administrator.

Things I have tried as suggested in forums and elsewhere in the internet:
1 I have "Re-armed" Vista - whatever that means. Still SP2 install failed.
2 I have disabled Windows Update, renamed the existing SOFTWAREDISTRIBUTION folder and created a new SOFTWAREDISTRIBUTION folder, re-enabled Windows Update and still SP2 install failed.
3 I have used subinacl.msi to run a batch file to reset permission settings just in case I was mistaken about my Administrator login but still SP2 install failed!!!.
I do not know what else to do.
4 I have tried installation both directly from the internet AND from the downloaded file.
5 I have tried installing whilst connected to the internet and whilst not connected to the internet.
6 Each time I had disabled any antivirus and firewall software.

Interestingly I cannot run Windows Media Player 11 either. When I try to run it I get the following error message "The file wmplayer.exe has a version number of 11.0.6001.7000 where 11.0.6001.7008 was expected. WMP is not installed properly and must be re-installed. Do you want to install the player from the Microsoft website?"



When I select YES the page "http://www.microsoft.com/downloads/en/resultsForCategory.aspx?displaylang=en&categoryid=4" opens up in my browser.
When I click on the link entitled DOWNLOAD WINDOWS MEDIA PLAYER 11, I am taken to the page "http://www.microsoft.com/windows/windowsmedia/player/11/default.aspx" where I click on the DOWNLOAD NOW link but that just takes me back to the previous page.

Maybe the two problems are linked.....I just don't know. What I do know is that I have spent 2 whole days trying to sort both problems and have got precisely NOWHERE.

I would appreciate any help.