Hi there everyone. Well, recently i was facing an extremely tough problem regrading the stability of my system. My system used to hang/crash and frequent encounters of typical windows BSOD's stating that "PAGE_FAULT_IN_NON_PAGED_AREA", "Some problematic file pciide.sys encountered error", "DRIVER_IRQ_NOT_LESS_OR_EQUAL","DEVICE DRIVER GOT STUCK IN AN INFINITE LOOP" etc the details of my events u can get from https://www.techspot.com/vb/showthread.php?t=24990 So after that,when i tried to connect my cable modem through USB port, it not at all got detected. (please note that it was being detected previously). And in none of the 4 ports it was being detected in windows. I did everything, installed all the latest chipset drivers, installed latest service pack 2 again etc, but nothing happened. And one fine day while i was working in the night, a huuge blasting noise came from the back of my CPU with a flash of sparking light and my machine became dead cold. it didnt started. And the very next day i figured out the my 400w SMPS powersupply got burned. So i bought a new power supply and replaced it and now my CPU is up and running. And i got back to sort out my modem trouble. So i thought that, might be my modem must have had some problems thats why its not being detected on my USB ports. So i took the modem to my friends place and checked in his computer, it was working fine and even got detected in the first shot. I also tried connecting my modem through my RJ45 connector cable to his ethernet port and it showed cable plugged without any "frequent unplugged errors like in my comp", i told everything to my friend about all the problems which started occuring right from the begining. He told me that even his computer power cable (which comes from the SMPS back and goes into the UPS got burnt thrice in just 3 months time, and it was all because that HE DIDNT HAD PROPER GROUNDING (ALSO KNOWN AS EARTHING) in his main socket. And once he plugged his UPS into the socket which had proper earthing/grounding, everything was fine and nothing happened to his comp for over 10 months now. So i also asked 1-2 more people i knew out here, they sad that even they faced the problems like hanging/crashing/ bad sectors etc just because they didnt had any proper grounding/earthing in their main power socket (where they inserted their UPS or CVT wire), and even their machine used to give shock when they touched it (whenever they stand on the ground bare foot without wearing any shoes or slippers)- all these symptoms were similiar to mine as even i used to get shock in the similiar situation from my machine (however the shock used to be non lethal as am still alive ). So i came back to my home and checked my wire connections and was suprised to found that my UPS wire is going into the socket which DIDNT HAD ANY GROUNDINGS OR EARTHINGS. So i immidiately removed my wire and inserted into the normal 220v main socket (which i suppose has proper grounding/earthing). And after that evrything, and i mean everything was over! all the BSOD's were gone, no network cable uplugged errors, and system is running fine like anything. But in this process i guess i have burned my SMPS (which i managed to replace with a new one) and 4USB ports because of the static elctricity which was circulated because of no gronding/earthing etc. The situation was so severe that if i used to touch the USB cable which came out of my modem to any metallic part of my machine, sparks used to come. And am sure that while inserting this USB cable in my USB sockets before i have lost my USB ports on the motherboard. Now the situation is that: none of my four ports on the back of my machine is working. So please can someone tell me is there any solutions to make sure that all my four ports are burnt?? And if they are, then is it possible to replace them? would clearing the bios help? And is there any fuse for the USB ports which gets blown up everytime when excess current is passed? Also please let me know what else damage which might have occured to my motherboard in the absence of grounding/earthing. ANy help in this matter would be appreciated. Tahnks and looking forward for your valuable replies, Serious_Indian.