This has only just started today - the letter 'U' has become 'Unstable' - I've taken the cap off in case it's got gunge under it, it hasn't. I havr to press REALLY HARD for the u to appear. Any ideas, please? No other letter is doing this.
I'm pretty sre it's not a Virus, I did a fill scan 2 days ago.
With the PC off, remove the keyboard, hold it upside-down and quickly tap the key continuously for a while. Try again then if still the same treat yourself to a new keyboard; click here price shouldn't put you off...ahem.
It can be possible to cure this but you need- Luck... delicate fingers and .....more luck.
Switch off and disconnect from the computer
Depending on how it is built you must dismantle it so that ideally the filmy printed layers under the keys are exposed. At every opportunity use a soft brush to stir up the dust and gubbins in there holding a vacuum cleaner nozzle to suck the muck away.
Some keyboards will come apart like meccano others are not really made to be dismantled at all.
If you can dismantle right to the filmy bit take extra care, they are incredibly easy to damage and ruin the whole project, you might still be able to clean the area even if you can't dismantle very far.
With everything as clean as you can make it, you can try a good blast of an aerosol (VHS Head Cleaner) into and around that key.
No need to drown everything if you use the fine tube to direct the spray. This leaves no residue when it dries.
Put everything gently back together again, cross your fingers, and try it.
I was very lucky doing exactly that only yesterday (the R key) but it was a triumph over commonsense and lots cheaper than a new keyboard
Bally Hell crossbow7 !! I've not seen this facility before, what an excellent thing! Here's the odd thing though - I've replaced the trial key cap on it's own letter and re seated the 'U' on the u. It seems to be working OK. BUT, this on screen keypad thing, I wonder how many people know about this?