Windows Installer (Winsows SP 2)

> Some windows files are not working for example if I try
> to install any windows component i get an error message
> Windows installer could not be accessed. This can occur
> if you are running safe mode , or the windows installer
> is not correctly installed. contact your support
> personnel for assistance.
>
> Now I am not running safe mode. and I cannot reinstall
> winsows installer as i'm running Win xp sp2 and my cd is
> win xp with sp1.at logon I am being warned by windows
> product activation that my hardware has been changed
> significantly and I must reactivate windows now . I did
> not make any Hardware changes
>
> also I get RPC server is unavailable, maximum retry
> exceeded and these services cannot be turned in admin
> tools as they are dependent on some other service that
> cannot be turned as well.
>
> I cannot copy and paste antyhing either Also if I try to
> open an application it is also not registered a pop alert
> states that this docoment could not be registered. it
> will not be possible to create links from other document
> to this documet.
>
>
>
>
> help HELP !!!!!
>
> Winston
>