Infcache.1 windows encountered problem

hello, i built my first setup and it ran fine for about 4-5 days until i installed my graphics card then found out my psu was weak so i took it out turned my computer back on then ran into this pain in the @ss error my internet connection says "no network available, please install network adapter drivers"

i put in my motherboards drivers and utilities disc and it tells me my LAN driver is already installed yet when i click on my network adapter settings in device manager it says i need to update so i manually update 2 out of 6 "WAN Miniports" then this new error appears:

"Windows encountered a problem installing the driver software for your device"

"Windows found driver software for your device but encountered an error while attempting to install it"

(Name of network adapter here) -WAN Miniport for me-

"the system cannot find the file specified"

i am desperate for suggestions this is like my 8th forum post today   and no one has a clue please help