My problem is not solved. My mouse and keyboard still become unresponsive. (Sorry about this, but I can't find further fix suggestions).

A great many thanks to the FAQ re: issue 4.21 (My mouse/keyboard becomes nonfunctional after 5-10 minutes), though my issues remain.

• I have deactivated all mods.
  
• I have re-associated .mp3 and .wmv files with Windows Media Player.
  
• I have downloaded and installed the suggested codec (8.0.0)
  
• I have downloaded and installed the suggested codec (8.0.1)
  
• I have restarted my computer after attempting each of these fixes.
  
• I have attempted loading different saves and going to different locations.

The problem remains and happens with all characters and inventory screens after two or three minutes. No items in the list will highlight. I cannot left or right click or move the mouse. I can use the arrow keys to move up and down lists, but using the enter key is very touch-and-go. I have 58 hours of playtime since my purchase three weeks ago (it's a good game!), but I can't play it like this.

When I manage to exit the merchant inventory screen the situation seems to clear up for a few more seconds, but comes back again.

I am running the Steam GOTY edition with all the DLC activated. I have no mods activated.

My computer is an Inspiron laptop, my inputs are the laptop keyboard and a stylus (though the stylus does not malfunction outside of the game and can be treated as if it were a USB mouse).

Many thanks for reading.
-Boojamon