I have an issue with my ndis.sys file. I'm not that knowledgable about solving computer issues so I'm posting here. Anyways, recently my antivirus software norton internet security reported that I had a trojan.gen threat in a file, ndis.sys. (the file was in windows/system32/drivers so im reasonably sure it was the actual driver, not a file that was somegow downloaded without me knowing) norton required me to restart in order to rectify the issue, so I did. However, after I restarted I noticed that I no longer have any access to internet, but norton now says that the file is now under quarantine. I should note that an ethernet connection doesnt give me internet either. I tried to copy the ndis.sys file from another windows 7 computer but the instant I placed it in the folder, I recieved a blue screen error and windows repair initiated. After that, I could resume windows as normal but the ndis.sys file I manually copied into the folder was deleted. I havent had any other blue screens except the one caused by pasting the ndis.sys file from another computer into the drivers folder. Ive attempted system restores as well to no avail.
I was told by a friend to use sfc /verifyonly followed by sfc /scannow in the admin cmd to try to fix my problem. However, seconds after finishing the verifyonly command norton autoprotect found another trojan.gen in a file in the folder c:/windows/winsxs/backup. This file had an obscenely long name begonning with amd64. The issue is that ive gone days without computer intrrnet access and during those days ive completed 2 full scans which revealed no threats. I just wish to know how I should proceed to fix my Internet and wheth r I should do anything about a possible plethora of trojans in my computer. Thanks all!