Huawei E1756 problems with Windows7

[cristiano.orlando]

Hi ppl

i am new here, but i am having problems with that model, e1756
firmware: 11.126.07.01.149
Software: 11.302.06.20.149

System: Windows7 x64
AV: Avast 4.8 free
Firewall: Comodo 3.13

Already tried to stop AV and firewall to check for compatibilty problems, but the problems persisted

those firmware and dialer are the last avaiable for my 3g carrier (vivo brasil-sao paulo)

it uses to get instable, and sometimes the signal bar goes to 5 bars but there is no connection at all, and sometimes the bar goes to 0 bars, and sometimes when my notebook screen turns off (but i keep downloading files at night), the usbmodem simples disappears from the system, so i have to manually remove and reinsert it at the usbhole

is there anything i could do ?
I have other huawei modem here from other carrier (claro-brasil-sp), e156b, is it better ? i know it has an ext. antenna plug, but the problem is that its blocked to use with other carriers, so i hope i can fix the problems, or some one could give the unlock code to this other device (e156b)

btw: if i use a "generic" dialer, it would work better than using the official one that came with my device ?

tks

[Jim.Mahoney]

Huawei have a Windows 7 hot fix installation...

Huawei Modem Windows 7 Hotfix | COOLBUSTER.net

File: Huawei USB modem Win7 Hotfix.zip

[cristiano.orlando]

tks for that now i hope it gets better
i found th huawei calculator and unlocked my e156b, and since the 3g signal at my room is week, i have to put in my window, but this week gonna buy an ext antenna since it has the ext plug

but even so gonna install the fix to make my connection better in my w7
tks !