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hard drive disappearing after startup - possible virus

September 21, 2013 at 19:13:01
Specs: Windows 7
Hello all, I am running a cheapo acer laptop with windows 7. Recently I dealt with a regsvr.exe virus shutting down my works - I got round it by loading a previous version of windows, then installing Microsoft security essentials. Things ran fine for a couple of days, but today I started up the computer, and a few seconds after login/welcome to windows, all the icons except for My Computer and Recycle Bin suddenly vanished from my desktop. The start menu remained, but nothing would open, and I couldn't ctrl+alt+del. Rebooting produces the same result every time, though safemode works just fine. A few seconds after windows loads, my C drive disappears from my computer, signaled by the sound of a usb drive being removed. Doing a virus scan in safemode produces no results. Any suggestions?

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September 21, 2013 at 21:37:34
How did you know you had the regsvr.exe virus?

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September 21, 2013 at 21:56:36
A few days ago I was trying trying to pull some photos off of a camera card. When the card loaded, suddenly I had a screen asking me if I wanted to allow "regsvr.exe" access to the computer. I didn't know what I was looking at, and although I hit no and went on about my business, the next time I turned the computer on, windows loaded to a black screen. The only thing I was able to do was to ctrl+alt+del into task manager, and using guides from forums such as this one I eventually found the calling cards of the regsvr.exe virus (mind you I'm no techie, I'm learning about these things as I go, and if I sound ignorant about these things, it's because I am). I took steps to get it off the computer, then loaded a previous version of windows, then downloaded Microsoft security essentials and ran a scan. The computer worked fine for two days, then this new problem started with no warning. I have once again loaded a previous version of windows from safemode, and everything is back to normal, but now I worry there is some latent threat in my computer which I don't know how to detect, and which MSE cannot seem to detect, and which is going to wake up every couple of days and shut me down.

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September 21, 2013 at 22:11:44
MSE ( I use it ) is an Antivirus whose job is the warn you not to go any further. I suspect you are infected, in which case with today's infections, you now have to go down a fairly long path to remove. A partial remove will be infective.

1: Run ESET Online Scanner, Copy and Paste the contents of the log please. This scan may take a very long while, so please be patient. Maybe start it before going to work or bed.
You may have to download ESET from a good computer, put it on a flash/thumb/pen drive & run it from there, if your comp is unbootable, or won't let you download.
Create a ESET SysRescue CD or USB drive
How do I use my ESET SysRescue CD or USB flash drive to scan and clean my system?
Configure ESET this way & disable your AV.
How to Temporarily Disable your Anti-virus
Which web browsers are compatible with ESET Online Scanner?
Online Scanner not working
Why Would I Ever Need an Online Virus Scanner?
I already have an antivirus program installed, isn't that enough?
Once onto a machine, malware can disable antivirus programs, prevent antimalware programs from downloading updates, or prevent a user from running antivirus scans or installing new antivirus software or malware removal tools. At this point even though you are aware the computer is infected, removal is very difficult.
5: Why does the ESET Online Scanner run slowly on my computer?
If you have other antivirus, antispyware or anti-malware programs running on your computer, they may intercept the scan being performed by the ESET Online Scanner and hinder performance. You may wish to disable the real-time protection components of your other security software before running the ESET Online Scanner. Remember to turn them back on after you are finished.
17: How can I view the log file from ESET Online Scanner?
The ESET Online Scanner saves a log file after running, which can be examined or sent in to ESET for further analysis. The path to the log file is "C:\Program Files\EsetOnlineScanner\log.txt". You can view this file by navigating to the directory and double-clicking on it in Windows Explorer, or by copying and pasting the path specification above (including the quotation marks) into the Start ? Run dialog box from the Start Menu on the desktop.
If no threats are found, you will simply see an information window that no threats were found.

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Related Solutions

September 21, 2013 at 22:14:33
The other choice, is to reinstall your operating system.

Make sure when you reinstall, you delete ALL partitions & format to NTFS.

W7 - Click on > Drive options (advanced) Then highlight each partition & hit > Delete.

Here are some examples of why you delete all partitions.

message edited by Johnw

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