Unable to delete virus even after reinstalling OS and completely formatting the hard disk

[AWS]

Hi,

 

I am struggling to get rid of an unknown virus in my laptop from past one week. I have scanned my laptop with microsoft security essentials, malware bytes, hitman pro and none of them were able to detect the virus. I used TDSSKILLER.EXE and it detected a virus.

The following are the details:

Operating system: Windows 7 (64 bit)

Detected object count: 1

Actual detected object count: 1

C:Program FilesDellDell Wireless WLAN CardWLTRYSVC.EXE - copied to quarantine

HKLMSYSTEMControlSet001serviceswltrysvc - will be deleted on reboot

HKLMSYSTEMControlSet002serviceswltrysvc - will be deleted on reboot

C:Program FilesDellDell Wireless WLAN CardWLTRYSVC.EXE - will be deleted on reboot

wltrysvc ( UnsignedFile.Multi.Generic ) - User select action: Delete

 

 

But even the TDSSKILLER.EXE failed to remove the virus. My laptop has become very slow and I am unable to get rid of the virus. Please help me if there is any solution for this problem.

My observations:

1. Whenever I have reinstalled the OS, I saw the following message immediately after boot:

setup is updating registry settings

2. These are the suspicious processes I find in task manager:

csrss.exe, atieclxx.exe, winlogon.exe (Suspicious since I am unable to find their location nor am I able to end these processes)

3. Getting an error code(0x80248014) when I try to update microsoft security essentials

4. I suppose its a rootkit since

(a) For the first time when I tought my laptop was infected, I scanned my laptop using MSE and during the scan my system crashed and the CPU clock got changed.

(b) I am unable to get rid of the virus even after reinstalling the OS and completely formatting my hard disk.

 

 

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