If you have microsoft Word installed, together with the french language in your current document you can add accented letters as follows:
For é - e acute type control+' - normally the single quote facing right nearest the return key, then follow it with the letter "e", and it will become é.
for è - e grave type control+` - normally the single quote facing left above the tab key, then follow it with an "e", and it will become è. This will work with all vowels by the way.
For circumflex type shift control+^, normally the character above the keyboard 6, followed by the vowel. For uhmlaut type shift control+colon ":", then the letter.
For Cedilla "c" type control+comma "," then the letter "c"
Whilst I haven't tried it, it may also work for the spanish lansuage.
There may be other combinations too!