fake windows messages

windows messages are popping up and it obviously shows that its a virus , adware or spyware because it shows spelling mistakes and obvious errors and its making me mad it pops up fake windows messages every now and again ( and trust me again is even sooner than now ) wut makes me even more suspicious is that how would windows figure out that i have a trojan r sumthin like that shouldnt it be kind of invisisble to normal computers?
i tryed spybot search and destroy and it destroyed most of the viruses/ spyware and my spyware doctor just expired wen i discouverd i have to scan it and its obviously fake so i need help

one of the messages : Your computer is infected with the last versions of PSW.x-Vir trojan PSW trojan steals your privat ( no spelling mistake ) information, click on this baloon to download the latest version of antivirus

Welcome,



In my signature is a link to hijackthis, click it and find hihackthis link on next page, follow directions and copy/paste a copy back here with the uninstall list also. Thanks.


Also...



1. Download this file - COMBOFIX
2. Double click combofix.exe & follow the prompts.
3. When finished, it will produce a log for you. Post that log in your next reply

Note:
Do not mouseclick combofix's window whilst it's running. That may cause it to stall.


Post a new hijackthis log also please.

__________________
Stalking and killing Spyware

Have we helped you? Please consider a donation to help keep D-A-L free. Click on donate below



MALWARE: READ FIRST Procedures:
|_ SpyBot V1.5 _|_ HijackThis Log __V2.0.2 _|



ASAP: promoting a high standard and quality of security support no matter where you seek help.