Solved: Internet connectivity

My laptop is behaving strangely and not connecting to some web sites. It can access this, but with a variety of others I get one of two 'Problem loading page' messages:

For google login I get:

Secure Connection Failed
The connection to mail.google.com was interrupted while the page was loading.

For my router I get:

Server not found
Firefox can't find the server at www.bthomehub.home.

or, for other sites:

The connection was reset
The connection to the server was reset while the page was loading.

I have a Nexus tablet that works fine. I've tried wifi and wired connections. And it's the same with Chrome and IE as well as Firefox

Can anyone help?

Sysinfo log below

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz, Intel64 Family 6 Model 58 Stepping 9
Processor Count: 4
RAM: 8055 Mb
Graphics Card: Intel(R) HD Graphics 4000, -1984 Mb
Hard Drives: C: Total - 669121 MB, Free - 547847 MB; D: Total - 26079 MB, Free - 21917 MB;
Motherboard: LENOVO, Lenovo
Antivirus: Kaspersky PURE 3.0, Updated and Enabled