What is the best portable virus/malware remover?

I’m trying to fix my cousins laptop, because it is having some problems. I can’t figure out what is causing it because it won’t let me download an antivirus or let malwarebytes run. Comodo stopped at 85% and would not continue after being left over night. Some sort of malware or virus is causing this. I need to know if there is a portable version of an antivirus/malware that will remove whatever is causing that to happen. Please and thank you.
P.S. I don’t want to have to reinstall windows if at all possible.
Answer #1
Try the kaspersky virus removal tool
http://www.kaspersky.com/virus-removal-tools
Answer #2
Well I was able to get into safe mode and it reluctantly allowed me to run malwarebytes. I will check out that though. Thanks for the info.
Answer #3
good topic!
J-WeB,
Are the programs you tryed/listed above the go to protection softwares for PC? I originally was a pc user since 95 but switched to mac in 2008 for graphic design and djing needs but now am back to PC because of cost effectiveness.. Anyways, I need to be schooled on the best methods to protect myself since i will be installing pc versions of all necessary progs that I am currently using on mac . Any help or info would be greatlty appreciated. Thank you!
Answer #4
Kaspersky Virus Removal Tool 2011
http://support.kaspersky.com/viruses/avptool2011?level=2
Answer #5
Download COMBOFIX, run it in SAFE MODE and wait…
http://www.bleepingcomputer.com/combofix/how-to-use-combofix
Answer #6
If you have problems running Combofix, Malwarebytes or any other antivirus, change the name of the .exe file ,so that the virus won’t pick it out and stop it running..
Eg. rename Combofix.exe to Combo-Fix.exe
http://www.geekstogo.com/forum/topic/245601-couldnt-run-combofix-similar-problem-as-other-thread-solved/
Answer #7
P.S. I don't want to have to reinstall windows if at all possible.
Like it or not, This would your best option really. I’ve been down that road before and I can
honestly say it’s not worth the bother, You could spend hours over hours trying to remove the virus
without luck, Time better spent reinstalling the OS! Some viruses can be very stubborn and hard
to remove. Also, No antivirus provides 100% protection and common sense does play a big role here, What
I’m saying is, If these things happen to your cousin often, You should convince him to use Linux, At least
that way (common sense or not) he’d be safe.
Answer #8
Also could use this and look for any out the ordinary .exe process’s running and manually remove it.
http://technet.microsoft.com/en-us/sysinternals/bb963902.aspx
Use this to better understand the removing process and what these infectious programs are and do.
http://www.bleepingcomputer.com/tutorials/how-to-remove-a-trojan-virus-worm-or-malware/