Hi,
Thank you for posting in Microsoft Community Forum. Please be assured that we would do our best to assist you.
Answer the following questions which would help us in understanding the issue:
1. When exactly do you face this issue?
2. Is it on a particular application like notepad, WordPad etc?
3. What is the make and model of the laptop computer that you use?
4. Did you try using On Screen keyboard to see if you get the right characters?
Try the following steps and check:
Step 1: To use on-screen keyboard
a. Click on Start, type “On-screen” without quotes and hit Enter.
b. Now check if you’re able to get right characters
Step 2: Test the issue by putting the computer into a clean boot.
Visit the link below to know how to put the computer into a clean boot state
**http://support.microsoft.com/kb/929135**
Note: Once the troubleshooting is done, reset the computer to start as usual.
Hope this information helps.
If you have further questions feel free to reply, we would be glad to assist.