This is one of the signs of key loggers. They sometimes screw up and I'm scanning like crazy to see what's crawled into this PC.
Start with scans suggested by grif at http://forums.cnet.com/7726-6122_102-5509131.html?tag=posts;msg5509131
I see a lot of questions regarding arrow keys on both laptops and desktops. My problem is on a laptop, and only happens when the arrow keys alone are pressed. When I use the arrow keys in conjunction with the Shift or Control keys, they work fine. So... I can press Shift+Arrow and I can highlight text, like it should do. Or I can press Control+Arrow key and jump around a document, like it should do. But when used alone, the arrow keys do not work, to move the cursor in any direction, up, down, or left or right.
I've tried pressing the f7 as some have suggested in other posts, and this does not work. My problem happens whether I'm in a browser, in MS Word, text document, or any program.
I do not have any games on my computer so it's unlikely that a game has changed the function of my keys. I don't use many programs outside of MS office and Firefox.
I haven't installed any programs lately that might have changed things. I thought about using the "restore" feature, and went back a couple of months. Still not working. This problem only started about a month ago. So not sure if going back further would help.
If I reboot, it works fine. If I go into the bios screen it works fine. I'm not sure what triggers the keys not working. If I reboot, and use the computer as normally as possible, I may notice the arrow keys not working anywhere from a few hours to a few days after rebooting. I try to keep track of what I'm using but nothing seems to trigger it.
I could be using MS Word, typing away and moving the cursor around with no problems, then suddenly the arrow keys don't work. Or I could be using Firefox and I try to correct a typing error and notice my arrow key doesn't work. It seems to be randomly triggered.
I thought maybe a driver might need to be updated, but I'm not sure which driver would be involved.
I have windows 7, on a Dell Vostro 1520, with 4 GB of ram and 750MB HDD. . Other than this issue, everything is fine.
The workaround for me is to just press the control button when I want to jump the cursor around, and just use the mouse/touch pad when I want to be more specific. A fix would be ideal.
Thanks in advance for any help.