[Q] Alureon.A: Causes and removal

Recently I exchanged some data with my friend via his pendrive. A day after transferring the data, Microsoft Security Essentials caught a trojan named Alureon.A. Though MSE detected the trojan, neither could it remove it nor quarantine it. Worse was that my laptop couldn't even stay on for even 2 minutes, it would simply reboot.Somehow after a lot of research I downloaded TSDD Killer from Kaspersky, the system rebooted, and then I ran it's scan and cured the trojan.Just wanted to know whether it is completely gone or may come back too. Some forum posts on some other websites say that the problem gets completely cured by TSDD Killer while some say that a format and re-installing of Windows is necessary.Can someone please give me a clear view about it? And I would also like to know the actual cause(s) for this trojan, Alureon.A.

Following this link: Can't get rid of Trojan-os\Alureon.A

P.S

Security Essentials was not able to remove it?

Have you enabled Automatic Updates in your system?

When was the last time MSE installed Virus Definitions?

Out of curiosity questions.

Following this link: Can't get rid of Trojan-os\Alureon.A

P.S

Security Essentials was not able to remove it?

Have you enabled Automatic Updates in your system?

When was the last time MSE installed Virus Definitions?

Out of Curiosity questions.
No, even some guys on other websites said that MSE couldn't remove it from their system too.

Yes.

Today evening at 5.30 PM and I encountered the problem at around 7 PM.

Dude! That's worrying, I too am using MSE from quite some time actually.

Never faced any issues though, as I kick away friends who require a Flash Drive Transfer.

Seriously, most of the times the issue is because of someone else's carelessness.

I still remember that a year ago, my PC was screwed up because of Kinza.exe

My HDD was old and that Virus made me dump it completely, all because of some stupid friend.

On Topic- TSDD Killer should have removed it.