Odd connectivity issue with Staff Laptop

[speckytecky]

A member of staff came to me this morning saying that her school issue laptop was connecting to her home ISP but wasn't pulling up the Internet. We are running through SWGfL so she knows to untick the proxy in LAN settings and had done so.

 

I live near the school and took the laptop home and connected the wireless to my home ISP. Sure enough same result. No website access through any browser with the proxy unticked and Automatically detect settings ticked.

 

Strangely in Network settings it's displaying Internet Access as OK. Also running a ping on bbc.co.uk that pings fine.

 

The laptop is Toshiba Sat Pro C660 running Windows 7 Pro and it has been giving her Internet access at home fine until this weekend.

 

Back in school with the proxy setting enabled the Internet is fine.

 

Any suggestions please?

[hallb15]

What anti-virus are you using?

I had something similar in a previous school and it turned out to be McAfee Internet Security causing the problem.

[speckytecky]

It's Sophos without a Sophos Firewall.

 

Odd that it has been running without any problem until now. I've tried a local log on and that has the same result.

[hallb15]

Try disabling Sophos temporarily, just so you can rule it out.

Another unusual thing that affects some ISPs is if the time/date on the laptop are incorrect. Doesn't have to be massively out, just a couple of minutes can be enough to make the ISP throw a wobbler.

[mikeprice]

Sounds weird - is there anything strange set up in the firewall?

[speckytecky]

All sorted now thanks as ever to input from Edugeekers. I'm blessed if I know what I'd do without it.

 

In my infinite unwisdom last week I'd installed Private Firewall on the laptop not realising that Windows Firewall was already active when away from the school. The two were clashing. Private Firewall now removed and all is ok again.