Error I/0 card parity interrupt at F000:F188 Type (S)hutoff NMI (R)eboot, other keys continue

look at the pci motherboard add on cards plugged into the motherboard . maybe one of them has gone faulty or is not seated properly in the pci slot.

no PC stated (name model) you did post to computers so....
No OS stated (windows 10? Linux, or? )
no options in or on the PC stated, cards present, usb toys connected. etc.

In most pcs you need to repair the start up. You probably have a virus preventing you from doing much of anything. Call the manufacturer and get the recovery key to push when you start it up and wipe it back to the day it came out of the box.
To get around to copy the files off before you do that try this. Press the windows key next to Alt and use the arrows on your keyboard to go up & down & left & right. If nothing happens when you press the windows key, the recover it as soon as possible.

I’m happy to help further over the phone at https://www.6ya.com/expert/wynn_5ba0205233ebfc15

Hi mmm it sounds to me like your motherboard has got some problems. sometimes running system tests through the boot menu may help but should indicate weather you need a new motherboard or not. Sometimes a good clean inside computer is the way to go as well... Hope this helps
Kindest regards

It sounds like one of the 3rd party cards has died. If you have a firewire card I would start by removing that and performing several cold boots (boot the computer, then completely shut it down as opposed to rebooting) If that doesn't fix it continue with the other cards, one at a time and replacing the previous card, until the issue is resolved. If you're still under warranty, call dell and request a repair.

Reinstall the Window 7

Try running the Check Disk Utility.

To run the check disk utility you will need a repair disc or a operating system disc. Put the disc in the cd drive and boot from it. You want to get to the Dos Command Prompt (Black screen with white letters) and type the following command: chkdsk /r
Check disk will run well over an hour or two and you will notice the percentages going from high to low, this is normal. Let it run to completion. Then reboot machine.

If check disk fails to solve your problem you might have to reinstall windows. Try doing a Repair Install that way you don't loose your data, documents, music, pictures, videos or programs.

In windows xp you get to the dos command prompt by selecting R for repair when the options appear.

In Vista and Windows 7 you want to get to the recovery console and look down at the bottom of the window for the Dos Command.

Hi there,
This error refers to an expansion card having an issue. If you've got any cardbus, wifi, bluetooth, etc cards take them out and see if that resolves the issue. More info here:
http://www.techsupportforum.com/forums/f217/i-o-card-parity-interrupt-at-f000-e1ad-417586.html

change the RAM. It will work.