I've recently upgraded my HP desktop (a6750y) to Windows 7 Enterprise (overwriting Vista). Things are generally ok, I use Panda antivirus.
Right after loading Windows 7 I got some nuisance virus, so I started over again. Upon re-installing Window 7 from scratch, I got another tiny nuisance virus that I seemed to remove without difficulty.
The issue is that after being connecedt to the internet for a while, all of a sudden I start getting "website not found" or something like that (usually in Chrome). Yet, while this is happening, I can use my gmail ok. Also at this time the desktop tray says "Internet access". Another similar HP computer right beside this one works fine while the a6750y has the issue I'm describing.
I did notice that I was on wireless which I didn't realize. Somehow this feature remained after installing Windows 7, as I had installed wireless separately (I think). I just didn't realize wireless was working on the machine. So I disabled it and the network cable then took over. I disabled the wireless because I thought that might be the issue, but it's still happening.
When I re-boot, I'm fine.
Often, after a period of idleness, I'll come back and the websites just pop up.
But it's a nuisance in that it pretty much makes the computer unusable. I have another computer right beside it that works fine and doesn't have this issue at all.
I do have a problem with the fans rev'ing up and down, I'm trying to fix this with SpeedFan, but that seems to be separate.
I just did a health check with HP Support Assistant, and everything passed.
What might cause the block to Internet sites ?