Wireless adapter gone corrupt

i really really hope i get some help on this. i have a sony vaio laptop.i tried to downlaod int explorer a few days ago..after the computer restarted I had no internet access. When I go to my device manager, in Network Adapters, everything listed there (the Direct Parallel, Intel Network Connection, and a bunch of WAN Miniports) has the yellow circle with the ! mark saying that the drivers are missing or corrupt. I've tried reinstalling the drivers, but of no avail. i treid uninstalling and reinstalling but still made no diff
any help wud be GREATLY appreciated :D
 
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