Since no one bothered to explain here what that means, and not all people know IT or grew in a country where 70% of programs are hacked, like me, i decided to explain what strong pass means, to avoid some of the future problems.
Well, strong passwords must be random, combining number, letters, and special characters, and long, over 6 keys (because hacker use programs who look for patterns, pattern meaning smth like 123 or qwer, or words etc, the bigger the number of keys, more complicated will be to deduce the combination). Usually they should look like "
#sR53Kd7".
And they should be changed if one feels that he risks being hacked (because in theory, they can be cracked, if the hacker is willing to wait for the program to compute all possibilities until it finds the right one - high sensitive networks are not connected to internet or they have strong firewalls).
http://en.wikipedia.org/wiki/Password_strength(is funny that in one of the wiki`s articles, one can even find a link to the dictionaries used by the hacking programs)
for spyware, install a good firewall (that`s why companies have firewall which forbids, for example, access to installed messengers, to avoid data theft)
aaa, and keep the pass secret