john4291 If your wanting to use one monitor - one keyboard - one mouse and 2 computers than you can do what I did. I use a kvm switch. It's simple to hook up. On 2 occasions I've had the mouse and keyboard not recognized.It was easy to fix. I just had to turn of the pc and unplug the power for about 2 minutes. With power back on everything was working. Mine has 2 ports (2 computers) costs around $30.00 My kvm switch connects Windows XP and Windows 7

I checked to see what add-ons I have.. I only have WOT, the dictionary, Java concole & Adblock plus. I disabled WOT & so far it seems to be running better. I would hate to be without WOT. I also went into AVG & unchecked "display notification window while E-mail is being scanned" also unchecked "display E-mail scanner related tray notifications" If these need to be checked I can always redo that. So far I have only had actual E-mail notifications. I will reinstall as a last resort.

So it begs the question - do you need all those 5 fans? Perhaps he was a high powered gamer. Where are these fans connected electrically? If one or more are connected to the motherboard you may find they are speed controlled by the yellow wire as Zep points out. Which are suckers and which are blowers? Front fans usually low in the case and suck in, rear fans are usually high on the case and blow out the back. The side fan sometimes comes with the fan sucking outwards but whenever I use a side mounted fan I like it blowing in to provide loads of cool air over the heatsink fan which is often very close by. If the previous owner was a gamer it is possible he has removed some higher powered toys including a power supply and replaced it with the original or equal, you might want to use the calculator linked below to feel sure your power supply is adequate. Here is a link that might be useful: Power supply calculator

agree I would plug all into the router that is much safer anyway since the router will or should have a firewall in it. If it were the ones hooked to the router that had the problem it could be a bad router but if the one you have issues with is not plugged into the router that is what I would try first. One of the first things an ISP tech will tell you is power down your modem and router, disconnect them from all power let set for several minutes then replug and try. Let us know if plugging that one into the router works. You always want to put the router between the pc and the modem to give you the added protection in the router.