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Vfat virus /boot sector type

Posted on 1998-11-09
Medium Priority
Last Modified: 2013-12-29
Had a malicious email from Holland- my clock kept cnanging times to 1996 etc Ultimately got the dreaded 'Non system Dsik error' Booted with the System Disk in a: drive and attempted to reinstall Win95, then got error messages about Vfat (thats why I call this one the Vfat Virus). I then tried to access C: drive from the A: drive. This was sucessfull. I guessed that the io.sys and or msdos.sys files had been corupted so I decided heck I am about to lose all my data anyway - so I simply typed sys C; at the A prompt. I then retried to reinstall windows95 AND IT WORKED :) So iv'e still got the darn virus only it is struggling to survive with unprdictable sytem files hehe
Though my MS Explorer is running really slowly Netscape is running fine. I am here on MS Explorer. I will try to get to Mc Afee Antivrus Site to get the FORM A treatment But I will check back to see if any one has an easier answer to this nasty bug.
Question by:mcaddan
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LVL 96

Expert Comment

by:Lee W, MVP
ID: 1727289
If you have a virus, get the antivirus software.  I prefer McAfee myself, but Norton or any other reputable 3rd party should work for you.

Accepted Solution

uilleann earned 90 total points
ID: 1727290
try fdisk /mbr
that should get rid of it.

Expert Comment

ID: 1727291
ooops, do that after booting from a CLEAN floppy disk
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LVL 96

Expert Comment

by:Lee W, MVP
ID: 1727292
doing an Fdisk/mbr MAY get rid of it for you (I had a hard disk that didn't respond to this and the only way to remove it was to use antivirus software).  But consider this.  You got the virus from somewhere and you won't be able to find out unless you get an antivirus package that checks floppy and you're hard disk.  Last time I checked, fdisk/mbr doesn't work on floppies.

Author Comment

ID: 1727293
Hi again Uillean and lew I wish could reward both but Uilleans answer is the better - incidently Mc Afee AntiV does not see the darn thing at all! It is still in there some where and has invaded a completely empty drive! H: that is.
Before I fdisk/mbr  the C: drive I wonder would that eraze the data out side the master boot record? If not does fdisk/mbr just renew the boot area and not the rest of the disk?
Any case I know enough not to crash but not enough to isolate this one!  PS I do like MS
experts board and am now beginning to use Explorer more than Netscape hmmmm I wonder if this is a result of the xcellent news reader that comes with Win95 :)


Expert Comment

ID: 1727294
leew is absolutely right, the fdisk /mbr ONLY changes your bootrecord.
The virus is still somewhere on your system.
First kill all files you got in the email that caused this.
Second, get a decent anti virus prog.
Look for Thunderbyte, it finds so much it sometimes drives me crazy, changed code (cracks)
viri off course and..., eeeh.., it can immunize your bootrecord. (also on flops)
I must warn, it's a whiner, but better very safe than very sorry, not?
So, a dutch trick led to this, let a dutch anti-virus prog solve it :)

Author Comment

ID: 1727295
Thanks Guys, incidently there appears to be two win.ini files. I dont know why. One is the regular one in the windows directory, a second was in the programs directory. I moved that one to a floppy. Performance was not affected! That file when edited is goobldy gook ... lots of charicters no recognizable text!
Here is the contents
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