You know that you must press the Shift key to turn the Stand By option into a Hibernate option, right
In that case, and especially since you reinstalled, you should take a look at your video driver(s) and get the latest from the manufacturers WWW site (not from Windows).
If you need help with that, do this:
Click Start, Run and in the box enter:
Click OK, and when the System Summary info appears, click Edit, Select All, Copy and then paste the information back here.
There will be some personal information (like System Name and User Name), and whatever appears to be private information to you, just delete it from the pasted information.
This will minimize back and forth Q&A and eliminate guesswork.
For video driver information, expand the Components, click Display, click Edit, Select All, Copy and then paste the information.