Windows XP sp3.
I keep getting this BSOD and it's always attributed to this file : znohylpprfiu3.sys
The blue screen reports code 0x00000050 or 0x00000024, however I think I saw a 0x00000047 as well but maybe not.
Microsoft report that sometimes the 0x00000050 stop error is caused by a virus and give instructions for removal. I do not have those registry entries though.
The blue screen always blames that file as do the memory dumps (unless I'm being dumb, if so please feel to correct me)
I cannot find that file on the pc or on Google.
The BSOD occurs a couple of minutes after the windows login screen appears, whether you actually log in or not. You can log in in safe mode, but BSOD appeared a couple of times when I tried to update the following two drivers:
PCI to USB open host controller
CPU to AGP controller
I did manage to get them to install in the end (perserverance not skill). I have updated all the drivers and would also do the windows updates but I keep getting an error : [Error number: 0x8007043C]
Tried deleting all the temporary internet files and cookies but it didn't help.
I have manually replaced usbhub.sys and usbd.sys with ones from another machine.
There are no System Restore points previous to my attempt to fix this machine although it was turned on, and I cannot create one manually because in safe mode. There are a couple that have been created since I have playing with it - think they are from automatic windows updates judging by the name for the restore points
I am suspecting some sort of infection but the fact it was blue screening with those two drivers is seeming to contradict this theory to me.
Plus I have scanned with Malware Bytes, Comodo, Bit Defender online scanner, Norton Security Scanner, Trend Micro Housecall online scanner. Nothing significant was found
Interestingly Comodo identified 6 files as viruses (torjan.backdoor.bot, I seem to remember without checking it) and they were actually Microsoft files. I haven't deleted them for now as I don't think that the result was correct. I will copy them to another machine to rescan and double check - Comodo has been installed onto this machine to try to fix the problem, but maybe it hasn't installed correctly, I just dont know right now.
The original security was Norton 360 but I removed that (used Norton Remaoval Tool).
Anyone know what is going on here or how I might troubleshoot further? Why can't I find this file on the pc or on Google (is it a random filename generated by a virus)?
It does have a pci USB card but I have removed that and no help.
It also has a modem card and graphics card installed, I tried to take out the modem card but it didn't seem to want to come out, and as it isn't my machine I din't want to force it as it is a little old. The graphics card I have left installed for now, along with the modem, as I will be surprised if this is due to either of them.
I do not suspect memory either due to the circumstances of each blue screen. but again I'm open to suggestions.
This site wont let me attach memory dumps - I could rename to something different to circumnavigate the checking but don't want to upset anyone - only just joined.