You're wrong if the network adapters are not bridged

Not sure if you can route it that way, but from my experience, I connected the other PC to the 2nd LAN adapter on the host PC, had both adapters bridged and worked without a problem.

It actually works, as long as you bridge the USB network adapter with the LAN adapter.

No problem, the memories are independent on their subsystem. If your processor is slow, that may lag behind though.

It should be pushing the air out from the inside. Were you skeptical because the fan spins too slow or you felt there were too little air moving?

Put a tiny piece of paper on the vent. See if it gets sucked in or blown off

What socket?

Not exactly, it sounded like some sort of wall socket rather than connection interface

I think he meant putting the 2 modules on the 1st and 3rd slot rather than 2nd and 4th. Sure, no compatibility and dual channel configuration issues.

2x2GB is better than 4x1GB since the chipset will have to work harder to accommodate the 2 extra modules. However, it's different story in overclocking.

1) AM2+ supports DDR2 while AM3 supports both DDR2 and DDR3 memories. So, AM2+ processor won't fit into motherboard designed for AM3/DDR3 but AM3 processor fits into motherboard with AM2/2+ socket with DDR2 and AM3 with DDR3.
2) Mainly speed, timing, overclockability, and aesthetics. In most cases, you won't notice any difference except in synthetic benchmarks.

1) Yes, just plug and play. No upgrade required unless you audio solution doesn't support 5.1 channels and above. Mind telling your current motherboard or sound card?
2) LCD TV? No, it doesn't have optical input.

1) Its integrated audio is 6-channel capable, so no problem.
2) Not too sure, it could be possible with analog instead of digital input? You can try going through this thread.

Take a look here.

Simple, use CPU-Z.

To be exact, only for LGA1366. Core i7 for LGA1156 exists, but limited to dual channel.

AMD's "Black Edition" processors feature unlocked multiplier, for easier overclocking by increasing the multiplier rather than the HTT.

If you don't overclock, the 710 or 545 is sufficient but depending on applications, those which rely on clock speed would benefit more from 545/550BE while those capable of utilizing more than 2 threads would shine better on the 710.

Certain games like Far Cry would benefit more from Phenom II X3 710, while GTA IV shines better on Athlon II X4 620. However, the difference is not too much since the former is only slightly faster than the latter. Investment wise, the Athlon II X4 620 would be better since more games in the future will support multiple threads.

That's odd, mind telling us the model of your motherboard?

No problem, but if stability issues do persist, you can get a 20-to-24-pin converter. After all the power requirement isn't that high.

Yes, normally the right side with the connector head facing you.

The power consumption of your system is not too much for your current PSU to handle. So won't really have any insufficient power issue.