|mmm a different keyboard would be the logical path to start with; and if the problem then disappears, you have your answer...|
However (and this is quite common in busy environments) it may be that the keyboard you have is either sticking on one key; and not necessarily the "I" key... (Is that the I - as Ivan - key, or the number one key you refer to?) It may be another lesser used key that is sticking, and the "I" key is part of a combination used in connection with it to bring up MMC. What is the key combination used to bring up MMC on your system?.
Many a keyboard is quite clogged with detritus, crumbs, sticky goo from food etc... and that causes keys to stick. Some even have liquids spilt into them too - and that often causes the problem you are having... It is possible to take most keyboards apart and clean them; paying attention to both the assorted circuit board tracks (nothing shorting one to another..), and also that all keys travel up/down freely... You can use iso-propyl alchohol to clean the innards of the keyboard; and there are cleaning kits/swabs around too for externals?...
But if this is not your bag... and a test with another keyboard removes the problem.. then perhaps buy an new keyboard - and recycle the olde one?
Incidentally some time back... 'Tis said that IBM did a swab-test of keyboards in their offices; sent them to a lab for checking... Results were horrendous. Swabs showed a high level of very nasty nasties on most keyboards - some of those nasties being very nasty if they got into one's inner workings... In short most of their keyboards were breeding grounds for infections various! So wise to occasionally (frequently...) clean the keyboard; if only for elf 'n safety reasons - let alone fewer problems technically?