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What to do if my computer is infected by a virus or a malware?

My uncle has a lot of viruses on his netbook. I think you know how he got them.

Anyway, my job is to rid them and restart everything from fresh. He doesn't have any important stuff he wants, so I could reformat but nobody has installation disc (the netbook doesn't have a disc drive either). So far... I can't open a web browser without it crashing, what do I do?

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marked as duplicate by DMA57361 May 6 '11 at 12:48

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Related:… – DMA57361 May 6 '11 at 12:45
In fact, it's not just related, it's a dupe and the linked question is a really good community FAQ post that addresses this very well already. I'm closing this. – DMA57361 May 6 '11 at 12:47

You'll probably save yourself a whole lot of pain and wasted time by doing a re-install. You can most likely buy a USB DVD drive or boot from USB key - either way, you'll have to obtain the OS media somewhere.

If you really don't want to go down that road, you could start with installing malwarebytes ( and see if it can sort out some of your issues. You can download a copy to a usb key on another machine and then install it. I recommend running this once and getting latest updates. Then boot into safe mode and rerun it until it shows up clear.

But as I said, you'll likely invest the least amount of time by doing a reinstall.

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Thanks for the suggestion but I have neither of those... how do I download something without a browser? (i.e. with command prompt). But I'll try to boot to safe mode first and try that. – meiryo May 6 '11 at 12:52
I'd suggest you download what you need on another machine, and copy via usb key. If the machine is already badly compromised and no browser works, you may have a hard time trying to download anything directly on that machine. – barryj May 6 '11 at 12:58

Well... You could run a full scan with Avast, Ad-Aware and Spybot. If you have a Windows 7 license I'd suggest you format and install W7 from a USB drive instead (just drag and drop the setup files from a W7 dvd to a bootable usb-drive/stick). Installing XP from USB is a bit more finicky, but also an option

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Create a bootable USB from one of the rescue disks out there such as this one (includes clamav antivrus) and scan your netbook offline.

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