any messages you are getting are being generated by spyware,so basically spyware is informing you that you have spyware,its a catch 22 situation,only fixed by a good clean up with several anti-spyware programs
to clean your system completely follow these instructions...
1) go to add/remove programs and remove any programs you dont recognize and anything you are not sure of,also anything you dont need(look out for any programs with names like dot.com/dot.net and any http names as they really shouldnt be in there as a program
2) use the following links and download these 3 programs
1 spy-bot....http://www.safer-networking.org/
2 adaware personal...http://www.lavasoftusa.com/software/adaware/
3 ewido anti-spy...http://www.ewido.net/en/
3) download and install these programs and run each of them in the order i have placed them..remember to update them all and to imunize spybot(important)
4)you are sure to find spyware with the 1st scan(spybot) and as you do each scan you should uncover more and more,one thing you will notice is a)the porn will stop appearing and 2)your p.c,s speed will dramatically increase as spyware slows your system down,in some cases ,alltogether
5)some spyware in spybot will not clean automatically,and will require a re-start,if so it is important you do this as these type of infection are the worst so restart your p.c if prompted,it may take a while to shift the infection but be patient,it will be worth it
6)once the computer is clean dont lower your guard,keep scanning every week(i run spy-bot every night),the best action is to kill spyware as soon as it gets on your p.c
also there are 2 other excellent peices of software you can download for free 1)mcafee site advisor..http://www.siteadvisor.com/,is a plug in that lets you know the saftey rating of every site you visit green(o.k) red(caution) grey(untested) i wont surf the net without it,it makes you feel safe to visit a site instead of thinking "has this site got spyware on it"
also a brilliant program called "windows defender" http://www.microsoft.com/athome/security/spyware/software/default.mspx
this works in the background and is permenently checking for any spyware or adware,and it does a daily scan in the background and will stop your internet connection if anything is found,good idea ,so you cant pass the infection onto anyone unsuspecting user
final word...spyware is a ever increasing threat and we all have to be on guard while on the internet,as spyware is coming in all types of forms bots,adware,cookies,rootkits,trojans,diallers ect,there are loads more but it would take pages and pages to write them down,just follow my instructions and you should stay pretty well spyware free
i get the odd one spyware,but these are normally just cookies and if you get them,they are low rating,cookies are what websites place on our hard drives to let them know we have been on their site,
any problems ,do not hesitate and contact me
good luck