JUST FOLLOW THESE SIMPLE STEPS:
1)goto START=>RUN
2)type regedit
3)select HKEY_CURRENT_USER and drop down control panel folder and then click desktop folder
4)At the right hand side,you can see registry settings
select=>Menu ShowDelay
then right click and select => modify
5)you can now see Edit String option default value data is 400 change it to 000 now press ok and restart your computer.your computer will be 200% faster.
Did you clicked the send button BY MISTAKE[ in the middle of something ]?
dont worry gmail provides a facility to undo your send mail
the Gmail has the feature,
you have to enable it under
Labs[ go to settings
,click labs,
find the [Undo Send] option, just enable it.] and When you send the message in the top of the page you can see