Why does my computer become slow after connecting to the Internet?

Erlis Dhima March 14, 2012
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Hello there! Lately I’ve been having some boring problems with my computer. When I connect to the Internet the computer gets slow. This only happens sometimes, not always. I thought it was caused by Windows updates, so I turned them off, but nothing worked. Also, I thought that this was an antivirus problem, so I uninstalled my previous one (BitDefender Total Security 2012) and installed a new one (Eset Smart Security 5). But nothing changed, the problem still exists.

When I’m using my browser (I use Mozilla Firefox 10.0.2), sometimes it gets blocked, and sometimes after that all the windows get blocked. I have tried using another browser, but the problem still exists. I would really be grateful if someone could help me with this. Thank you!

My computer info:

Windows 7 32-bit
Intel Core 2 Duo T9300 (2.5 GHz)
Up to 1791MB NVIDIA GeForce 9500 GS
4GB DDR2

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