Hi johny_chan,
Here’s some free scanners you can try (including avast! of course!)
If you’re still having problems at the end, some more information would be useful:
- Symptoms
- Name of malware detected
- Name & location of detected files
- Your operating system
Good luck!
Look for and remove rootkits (hidden malware):
Panda Antirootkit
Blacklight
AVG Anti-Rootkit
Try a boot time scan with avast! Right click the scanner screen, select ‘schedule a boot time scan’ and reboot when requested.
Try a scan with DrWeb CureIT!
Try the usual free adware/spyware scanners.
AVG Anti-Spyware Free (Requires Win2k/XP)
Ad-Aware Free
Spybot Search & Destroy
SUPERAntiSpyware Free
a-Squared Free
Download, install and update the programs. Disconnect from the internet (pull the plug) before running scans in Safe Mode if possible.
Always select the option to quarantine any malware found rather than delete it, then you will be able to restore files or registry entries wrongly identified as malware- a rare but not unknown event for any malware scanner.
Try some online scans. (Disable avast! while scanning.)
F-Secure
BitDefender
Panda
Trend Micro Housecall
If still having problems, post a HijackThis! log.