I have a strange problem, When ever i copy the bitcoin address and paste it any where online or in any documents it changing to the another address. could any body know the solution how to fix this problem. I already scanned with the malware bytes but no use.
It sounds like more then a problem, sounds like some sort of security issue. It is NOT normal or ok for BTC address to change when being pasted. This sounds like you have been compromised. It might not have found it but if this is something you can replicate it sounds like virus/malware. Does it always past same address? If so what is it?
I would get all hot wallets off that machine if you have any. Also if you had any private key's stored on it send coins to new safe address. Don't sign into anything important, and if you have change password and not use it on that computer till you can find out what is happening.