Hey guys! I just joined here and I'm having a major problem with my computer. Two days ago I upgraded my desktop computer from Windows XP Home to Windows 7 Pro. I'm studying at University and was granted access to the OS through a website called MSDN, a place that offers free software to students in education here in the UK. I backed up all my XP files and installed the new Windows, all of which seemed to go pretty much perfectly at first. My system works great when not connected to the Internet, however when I am connected it becomes plagued with constant freezing issues. I plug my computer into the University network via an Ethernet cable and have had no issues like this before with XP. I can also confirm it's not a network problem, as my flatmate two doors down also has Windows 7 installed with no issues what-so-ever. When connected to the Internet, Windows Update and such seems to work fine and the majority of the time I'm able to view websites using Firefox, be it a bit slow compared to browsing the Internet on my XP based laptop (which I'm using right now to post this.) It's odd that the lock-ups seem to appear when accessing the Internet through programs like Steam and Windows Live Messenger. It doesn't always happen straight away, but I'm pretty much 100% sure that if my Media Player begins downloading album artwork from the net or if I open more than one Firefox tab at a time, the system will crash. Everything stops working and the red loading light on the front of my system dies completely, forcing me to restart using the button on the front of the case. It's extremely annoying and it's pretty much preventing me from using my PC, everyone relies on the Internet too much these days, me included... If this helps, my PC specs are: Sorry to rant, any help would be much appreciated! I love the look and feel of Windows 7, I just wish these crashes would stop.