What is sabotaging this download?

[unstresst02]

I can't find which program or process is sabotaging my attempts to
download yahoo messenger.......I've done the task manager and shut off
all aplications, but still cant complete messenger install......help

 

[Guest]

Scan for spy/malware with adaware and spybot search and destroy, sounds like
something is running in the background and hidden. are you losing your
internet connection?