Type systeminfo in a command prompt then press enter. See which Realtek lan you have. If 8111, use this link to download the update. If anything else, search on the left side for the number instead:
It's showing NTFS involvement, which means the hard drive. Run this command from an elevated command prompt for each hard drive partition letter on the machine. Change C to match them each time:
Then it's very likely there is defective RAM. Test overnight with Memtest86+. You might have to isolate the modules and test one at a time to find errors.