Not sure if this is the correct place to ask for help but I think I may have some kind of virus on my computer. I'm currently running windows vista on 64 bit. I've recently noticed that under my task manager/process tab that two versions of explorer.exe are running (this happens seemingly randomly and will start up on its own). I've honestly never seen this happen on this computer until I started noticing it pop up randomly a few weeks ago. Not sure if this was by chance or not, but I also noticed that my ping was incredibly high until I closed one of the two instances of explorer.exe (generally the one with lower pc usage); I've also noticed pc slowdown when this second explorer is open during the last week. Now, in the past in weird buggy occasions I've seen explorer.exe crash and have had to either restart the computer or manually restart explorer.exe at which time I notice my screen/icons refresh or my start menu pop back up/cycle back, but for some reason when I close that second instance of explorer (the one with lower pc usage) there is no visual refreshing of anything and I simply have better ping and programs respond quicker.