Member Avatar for rajib.chandra

when i connect my pc to the internet my system automatically starts downloading data. what should i do???

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The symptom reported by — a burst of inbound traffic (~50MB) immediately after the PC connects, then stopping — can be either benign (updates, cloud sync) or an indicator of an unwanted background connection. This note builds on ’s request for OS details, ’ Task Manager advice, and ’s packet-capture suggestion with a short, practical troubleshooting workflow and remediation checklist.

Common benign causes: operating-system or antivirus definition updates, cloud‑backup or file‑sync clients, application auto‑updaters, and scheduled tasks that fetch large packages when a connection resumes. Less common causes include misconfigured router/network services or malware. The priority is to associate the transferred bytes with a specific process and remote host before drawing conclusions.

Practical, ordered checks that avoid scary guesses:

  • Use the OS’s per‑process network view (Network tab in Resource Monitor or a process-aware connection viewer) to identify which process is sending/receiving the bytes — this refines ’ Task Manager idea.
  • Review system and security update history and any updater logs for large downloads that match the timing.
  • Perform a clean boot (disable third‑party startups/services) and reconnect; if the transfer disappears, a third‑party program is responsible.
  • For deeper analysis (as suggested), capture traffic or use a process‑aware monitor to obtain remote IPs and then check who owns those IPs to decide whether the traffic is legitimate.

Remediation pointers: for known updaters/sync clients, change update/sync settings or schedule them; for unknown processes, isolate the machine (block at firewall/router), run full offline scans with reputable anti‑malware, audit startup entries with a trusted autorun inspector, and change critical passwords from a different clean device if compromise is suspected. If identification is inconclusive and risky behavior continues, a backup-and-clean reinstall is the reliable end‑game.

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Member Avatar for BigPaw

Which operating system?

Do you know what sort of data?

If you don't know what sort of data, then please tell us what is happening, or what you have seen that tells you that data is being downloaded.

Member Avatar for rajib.chandra

Whenever I get connected to the internet my modem interface shows a continuous receiving of data even when I am not surfing or downloading (just connected to the internet).

Member Avatar for silvercats

does it stop after few sceonds ? If so it is normal. If not it can be something other. What is your Anti virus?

goto command prompt ant type "netstat" when this happens (close all the browsers, torrents and other internet using applications before you do this) and you will get a result. take a screen shot or copy paste the result and show us.

Member Avatar for rajib.chandra

Actually everyday after connecting the system downloads data of around 50MB. after taht it stops. I use Microsoft Security Essentials as antivirus. I regularly update it.

Member Avatar for JorgeM

Not sure how technical you are, but if you installed a packet capturing application such as Wireshark, you would be able to see where the traffic is coming from (source IP address). You would then take this info and use WhoIs to see which orgination is using this IP.

Member Avatar for rajib.chandra

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Member Avatar for silvercats

1.Go to the taskmanager and see if 'iexplorer' process is running or another web browser process is running after closing all internet applications.

2.do a "netstat -n" again and post the reult like this.

3.type "ipconfig" and tell what is your IP address.

4.http://www.nirsoft.net/utils/cports.html Install this netowrk connection viewer. It is supposed to show the applications that uses TCP/IP. and tell us what you see

Edited by silvercats
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