windows installer service not acessable

[Guest]

afte clicking on google earth I get the message "installer service could not
be accessed.
also when I try to copy photos from my files to a disc in my d drive I get
computer already usiing disc.
this has only recently happened as I could always access these programs. the
2 problems happened at the same time and there could be more I just don't
know.
any solutions please
Windows XP and service pack 2

 

[Guest]

afte clicking on google earth I get the message "installer service could not
be accessed.
also when I try to copy photos from my files to a disc in my d drive I get
computer already usiing disc.
this has only recently happened as I could always access these programs. the
2 problems happened at the same time and there could be more I just don't
know.
any solutions please
Windows XP and service pack 2

 

[animal]

 

[animal]

Thanks "yeenie" I am brand new at this.