desktop computer indicates low battery??? and other problems

[laserjet]

i have a pentium d805 with a ASRock 775Dual-VSTA mobo and an Ultra V-Series 500W Power Supply. first, my wireless pci card works only for a few minutes and then i get blank webpages suddenly. (i cant disable the card to reenable it). i also had the same problem with a usb wireless adapter. i also noticed that the icon in the taskbar which shows how much battery life is left on a laptop is flashing low battery even though this is a desktop not a laptop. i bought a powerful enough power supply so i just dont get it. i have a feeling the two issues are related but any suggestion?

 

[Seekermeister]

I don't know about the other issue, but check to see what Power Scheme is selected.

 

[laserjet]

it does this for all power schemes. it is a desktop so i dont get why it cant realize that it is plugged in not on any battery power at all.