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Sirefef/ Vundo/ Gen:Variant.Kazy trojan infestation. Please treat me as newbie

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Hello all,

Although I've used computers one way and another for many years, I would ask everyone to treat me as a complete beginner and ask me to do things in a very simplified form. Thank you.

Before I forget/ do the logs, it would helpful to write the symptoms/ error messages.
Within the last few days, Win defender has been repeatedly popping up and telling me that I have a Sirefef Trojan infestation (I would write the correct 'address' for this, but Win defender isn't periodically 'auto-scanning' as it has been, so I do not have it). I looked online, found Bitdefender's online scanner, ran my browser as admin, scanned and got the error 'You have a Gen:Variant.Kazy.221... Trojan dropper', looked on wiki etc. and was told that this was from the 'Vundo' family of Trojans.

The machine is a Sony Vaio running Windows 7 from a couple of years back.

Last night the laptop 'unexpectedly shutdown', this morning the Windows error dialogue posted this on my desktop window:



Problem signature:



Problem Event Name: BlueScreen

OS Version: 6.1.7601.2.1.0.768.3

Locale ID: 2057

Additional information about the problem:



BCCode: 116

BCP1: FFFFFA80078324E0

BCP2: FFFFF88002CFB40C

BCP3: 0000000000000000

BCP4: 0000000000000002

OS Version: 6_1_7601

Service Pack: 1_0

Product: 768_1

Files that help describe the problem:



C:\Windows\Minidump\081713-42775-01.dmp

C:\Users\Gigi Lyons\AppData\Local\Temp\WER-20306509-0.sysdata.xml


So Bitdefender's online scanner says Gen.Variant.Kazy, Windows defender says '..Sirefef' and I am already confused at the naming process.

Worse, since this reboot [and the new window's dialogue with the BSOD message], 'browser run as admin' doing another online scan tells me I'm clean, as does Win defender. (now I'm very uncomfortable). On with the logs:

TSG SYS INFO
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: AMD E-350 Processor, AMD64 Family 20 Model 1 Stepping 0
Processor Count: 2
RAM: 3690 Mb
Graphics Card: AMD Radeon HD 6310 Graphics, 384 Mb
Hard Drives: C: Total - 291775 MB, Free - 235321 MB;
Motherboard: Sony Corporation, VAIO
Antivirus: None

Thank you very much for your help/support. Thank you also for 'holding my hand' through this... it's odd, I have a tower [poss 2] that definitely need de-bugging/cleaning and I also have some concerns about a relatively new Lenovo I bought for myself- if we can sort out this family machine then it would be really wonderful if solutions could be found for my machines.

Thank you again

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