Solved

w7 pro internet connection blocked by some virus or program

Posted on 2014-11-25
6
217 Views
Last Modified: 2014-11-27
hello experts
something weird happens with w7
network shows connection to the internet fine
but i cannot see any network computers and cannot access the internet!
- windows updates cannot access the internet for 1 year already
- windows time cannot access the server and cannot be updated
- antivirus avast cannot access the internet

i installed avast using USB and scanned it for viruses. avast found bunch of viruses and deleted them ...
also i run windows malware -- it also "found and fixed" however the problem is the same!
nothing can access the internet! NOTHING!

at the pc was installed Factory Talk Software which works fine and connects to PLC fine locally....
but PC hasnt been updated for around 1 year

also when i run antivirus avast it told me that some program is blocking it .....

could you please advice how can i check what program took over the PC control .... ? or something ...
looks like all ports maybe blocked ....

regards
0
Comment
Question by:nzrubin
6 Comments
 
LVL 92

Accepted Solution

by:
John Hurst earned 250 total points
ID: 40466090
Scan again with Avast and then scan with Malwarebytes (malwarebytes.org).

If the viruses are bad enough, back up everything, and reinstall Windows.  If you have a recovery partition to do this, use it to delete all other partitions, format and reinstall Windows. If you do not have a recovery partition, delete all partitions, format and reinstall Windows. WHY? Because root kit viruses can survive formatting.
0
 
LVL 24

Assisted Solution

by:VB ITS
VB ITS earned 150 total points
ID: 40466092
I agree with John, a complete wipe of your OS may be the way to go here as it sounds like your machine has been deeply infected. Back up whatever files you can to an external drive then reinstall Windows from scratch.

Without knowing what you have been infected with, it will be very hard to identify and remove the malware.
0
 
LVL 4

Author Comment

by:nzrubin
ID: 40466368
thanks for replies!
the only program that can access the internet its a Factory Talk (alan bradley PLC software)
it connects using open port ...
can this program block all the other ports ?

regards
0
Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

 
LVL 6

Assisted Solution

by:Rob G
Rob G earned 100 total points
ID: 40467013
I would check a few things before i reinstalled everything..
AV's tend to give false positives, and there are also some things that can cause this locally without it being a virus..

Press the windows key on the keyboard.. and the R key at the same time.
In the run area type in CMD and press OK
There will be a black box that pops up..
Type in "Ping google.com" (without the quotes) and see if you get a reply or if you get something else.
If you get a reply..
Take that number.. 123.123.123.123 and type it into your browser and see if you can get to the page. If  you can, this is simply just a DNS issue, or possibly a virus that has hijacked your hosts file, which is simple to fix, and will save you hours to repair your PC.

Alternately you can use another machine to go:
http://www.avg.com/us-en/avg-rescue-cd

and download the free boot CD.
This will scan the machine at boot, which is F8 on the keyboard at boot (Dell) and boot from CD.
It will run a full scan and likely fix the issue on boot..
0
 
LVL 4

Author Comment

by:nzrubin
ID: 40468263
thanks for advise!
when i ping google. com the reply is dead!
host cannot be found!
also CD rom stopped working so i cannot use it

i will try now to use avast usb rescue (Rob G give me a hint, thanks)
0
 
LVL 92

Expert Comment

by:John Hurst
ID: 40469903
@nzrubin  - Thanks, and I was happy to help.
0

Featured Post

U.S. Department of Agriculture and Acronis Access

With the new era of mobile computing, smartphones and tablets, wireless communications and cloud services, the USDA sought to take advantage of a mobilized workforce and the blurring lines between personal and corporate computing resources.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

New Windows 7 Installations take days for Windows-Updates to show up and install. This can easily be fixed. I have finally decided to write an article because this seems to get asked several times a day lately. This Article and the Links apply to…
When you try to share a printer , you may receive one of the following error messages. Error message when you use the Add Printer Wizard to share a printer: Windows could not share your printer. Operation could not be completed (Error 0x000006…
Windows 8 comes with a dramatically different user interface known as Metro. Notably missing from the new interface is a Start button and Start Menu. Many users do not like it, much preferring the interface of earlier versions — Windows 7, Windows X…
In this video, we discuss why the need for additional vertical screen space has become more important in recent years, namely, due to the transition in the marketplace of 4x3 computer screens to 16x9 and 16x10 screens (so-called widescreen format). …

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

23 Experts available now in Live!

Get 1:1 Help Now