Windows

maybe try running ad-aware spyware remover from www.lavasoftusa.com.

I agree with sgt. There is spyware out there that hijacks the browser and sends it to a proxy server of the hack's choice. I had to remove it from a client's PC because she was having the same problem. Go download AdAware SE 1.5. The new build just came out.

I have used almost every spyware removal tool out there because of a recent problem with a clients pc. I had some real pesky spyware and couldn't get it off but I found this Giant AntiSpyware it is only a 15 day trial but it works great finds tons of stuff that spybot ect doesn't find.

http://www.giantcompany.com/files/GiantAntiSpyware.exe

1 first cheak the drivers.
2 cheak if the workoffline box in file->menu is cheaked if so uncheak.
3 del cookies,del file in the internet option.
4 goto connection tab in the internetoption and make that connection as default,and also do cheak the minear setting which we always forget to see.
or may be the laptop is not supporting the kinda speed connection,coz as i understand u are able to connect through a dextop,
or just try connection it with another laptop see if its working and write back.
THarun