I had 7.0 and it worked fine, when i updated to 7.5 every time i try to sign
in now i get the error "Messenger has encountered a problem and needs to
close. We are sorry for the inconvenience." if i click on send error report
a window displays saying
"Microsoft security worm/virus alert

Thank you for submitting an error report.

Problem description

The error was likely caused by:

Win32/Small.CA"

however when I use the service to scan my computer no worm is found, not
with microsoft's pc scan thing or my anti-virus or anti-spyware software.
Please help me messenger closes whenever I try to sign in.