I have bought a new high configured computer. I was using it happily for the first two months. Now i have upgraded it by installing windows 7 into it. Initially i was running windows xp on my computer but never came across any problem with the windows caculator. But from last two days my windows calculator shows only half digits of whatever i type into it. This may seems bit crazy to you but i am not joking. May i please know why this is happening to my calculator.