A complete re-installation of the 2011 operating system will speed things up. Adding 4GB memory would also help. Both the Inspiron 580 MT and ST use the same OEM memory.
* 8GB is the maximum supported
* Four slots, DDR3, 1066MHz or 1333MHz, Unbuffered, Non-ECC, 1.5v, 240 pin
2GB + 2GB + 2GB + 2GB
This may seem off-topic, but after the last post, as I was shutting down the computer, I heard a loud pop at the back of the computer and a burning smell emanated from the Central unit. The APC UPS led turned red and the computer switched off.
I am now searching the Dell web site for a replacement for the Bestec TFX0250P5W power supply originally installed on the desktop. Advice on the memory will come in handy in case it needs to be replaced as well. Thank you.
Inspiron 580/580 ST OEM 300w PSU part numbers =
BIOS does not need an upgrade. Reinstall on a new motherboard however will not be activated. There were ZERO upgrades from XP or Vista to 8 or 10.