somebody help me against hacker

[milie]

there is a file stick on my computer. name is "aYerHS.txt", content is "=================================================
W32.@YerH$.B,Made in India.
wE aRe thE greAt iNdiAnS.
----------------------------

iNdiAn hAckeRs + vXerS teAm up...
aNd kicK lamEr a**

no m0re pAk ****..
itZ oUr tiMe to shOw tHem, the p0wer of teaM w0rk.

f**k AIC,GFORCE,SILVERLORDS,WFD..f*****g k1dd1es..
no **** bUsineSS iN heRe aNd
nO lamE stuFF..
=================================================

>> qph@hackermail.com
"
I dont know where it came from, even I delete it and empty trash can, It still come back again whenever I restart my computer.
some files and folders changed general attributes to hidden themself.
there is a jpg file small icon face changed to backup face or mouse face.
:mad:

[beetle]

Get some antivirus software

http://www.google.com/search?sourceid=navclient&ie=UTF-8&oe=UTF-8&q=antivirus+software

[Morgoth]

Edit:
Sounds like you have a virus installed on your computer...
Anti-Virus software will help you!

[mouse]

Get some av software and a firewall, and preferably some spyware software like Spybot or Ad-aware. See the sticky for more details.

[Keltoi]

Confirmed,
You have the Yaha virus:
Trend Mico AV Site (http://www.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=WORM_YAHA.L&VSect=T)

[pagekeeper]

To prevent this happening again my suggestion is to get Norton personal firewall 2003 you'd be suprised how many Trojan horses you can get and it can block popups

[Morgoth]

It's not just the firewall that will protect you, you can also turn off stuff that windows is already running.
Such as Printer File Sharing... I got a virus type trojin through that thing... And I still had a firewall going...
It's auto let in because it's a windows product kind of thing...
I fixed it, and I have been virus and problem free for a long, long time.