Can't ping, tracert or RDP network computer: win7

Computer is Win7 fully patched
Friday we were able to ping, tracert and RDP the computer.
Today we cannot ping, tracert or RDP the computer by name or by IP.
Firewall is turned off and has been since this computer was brought online over a year ago.
The computer is turned on, logged in, and working on the network just fine....just not reachable by the network, if that makes any sense? It can reach the network. It cannot be reached by the network.
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Check the services on the laptop, sounds like some of them are stopped.  
rap1971Author Commented:
No laptop involved.
What services do you think are stopped?
If you look in the services you'll see that there are automatic starting services.  If any of those are stopped then try starting them. Make a note of any error messages that you get, either on screen or in the event logs.

I would suggest any browsing or network services.

Let us know how you get on.
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Laptop or desktop is irrelevant.  I was typing this on a laptop - mea culpa ;)
rap1971Author Commented:
All Automatic services are started.
There are 3 Automatic (Delayed) services not started ... 2 of them are .NET (inconsequential) and the other is Software Protection (also inconsequential)

I restarted the "Network Connections" service.

The computer is still unpingable (is that a word?) and unreachable with RDP.
rap1971Author Commented:
There are nothing other than informational warnings in the Event Viewer.
Neil RussellTechnical Development LeadCommented:
Pick any other computer on the network, call it A
Your 'faulty' computer, call it B

Can B Ping A by IP?
Can B Ping A by name?
Are they on the same local subnet?
Are they on the same VLAN?
Is the NETWORK MASK and DEFAULT GATEWAY correct on both machines?

Thats where I would start..
rap1971Author Commented:
Yes B can ping A by IP
Yes B can ping A by name
There is only one subnet in the building and they are both on it.
No virtual anything going on here.
DHCP assigns all IPs, so therefor everyone has the same  mask and gateway.
Again - this was working FRIDAY. Not today. I am the sole network/systems admin, no changes were made to the machine or the network.

This has happened before.
Then suddenly, stopped. and now it's happening again so I'm asking.
Neil RussellTechnical Development LeadCommented:
What Antivirus solution do you have in place?

If B can ping A but not the other way around AND the networks are the same AND Windows firewall is off then that would be my next point of call.

Check AV, if possible dissable for a quick test.
rap1971Author Commented:
Disabling Kaspersky now I'm battling that. The firewall in Kaspersky is disabled, and the computer is in a protection group with 7 other computers that are not experiencing this problem.

It didn't even occur to me that it could be AV because she's in the same group with others!
Neil RussellTechnical Development LeadCommented:
There is a current unpublished issue with Kaspersky that does not completely vanish unless it is uninstalled.  We have reported it a few days ago but as yet they have published nothing.

Glad to have helped

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rap1971Author Commented:
ok, well at least now I know I'm not crazy.
well I might be crazy but this isn't why.

As for the unpublished issue - if I uninstall the client on this particular machine and then reinstall it, hopefully forcing it to use the protection policy assigned, will it clear up or no?

The whole thing is so odd.
Neil RussellTechnical Development LeadCommented:
it has not worked for us. the issue seems to be at a very low level driver issue.
rap1971Author Commented:
hrmph. ok.

well at least for now I know if she wants to rdp her machine she can just turn off the client temporarily...
Neil RussellTechnical Development LeadCommented:
You may now award the points as acceptance of the solution.  You are a new member here?
rap1971Author Commented:
No - I've been a member for probably 14 years. I find that nothing I'm doing is "reinventing the wheel" and most times I find what I need in other solutions and have rarely posted.
Neil RussellTechnical Development LeadCommented:
Ah ok. Well glad to have been of help.
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