Thank you all for the input, I am surprised! Still figuring things out. It troubles me that although I have the latest updates for the protection programs it still doesn't get detected?!
vdvyveras i found my "data sent" problem. It was
Agent Trojan. What i did was to schedule a boot time scan with Avast home ed and Agent Trojan was found in the pagefile of my E: I've got a 40gig HD devided as C: & E: and that's the reason why the trojan was still there after formatting C:
OK now Avast could not delete neither move the culprit, so i went to System Properties > Advanced Tab > Performance > settings > Performance Options > Advanced tab > Virtual memory > Change > Highligted my E: and tick "No paging file" > Set > OK. Now with no pagefile on E: anymore, the trojan moved and then i picked it up with AdAware and delete it.
I've just checked and my "sent" is back to normal eg. with browsing i recieve 3.6 Mb and sent 550 Kb, while with the trojan i recieved 1.8 Mb and sent 1.1 Mb.
So i guess this is why i've lost such a lot of data the past 2 months, and i think you might find something similar.
Good Luck.
