Goblin_17 :
It is a lenovo G40-45 model. I think it is a mix of amd and intel. After reboot, the screen becones on and off repeatedly. I can see what is in the screen since it does not turn black but i still can click on any of my app.
Is this your Lenovo:
http/www.shopclues.com/lenovo-g40-45-80e100cyih-amd-a8-4gb-1tb-windows-10-integrated-graphics-3.html?&utm_campaign=438911&ty=0&id=6-72-cd26c3ef-de4d-451d-8fce-3b09e8c5d009&mcid=aff&tid=nh&utm_source=OmgNetwork&OfferId=15
If so, I know a bit more about your computer now.
If your screen is flickering and the computer doesn't respond to any input, it seems that installing the old AMD driver has messed up the computer very badly. I think you have to perform a factory reset. I hope you haven't got too many important files on the system, because this will erase everything.
The G40-45 has a small Novo button located on the left side, right next to the power cord. Here's a link with detailed information:
https/support.lenovo.com/dk/en/solutions/ht062552
NOTE This is a drastic option and you may want to try out a few other basic steps before resetting the computer:
1. Restart the computer. At least 4 or 5 times.
2. Hold down the power button for at least 10 seconds and see if you can access the safe mode menu.
3. Unscrew the bottom panel and re-seat the RAM module. Then disconnect/connect the battery. Then do the same with the HDD.
One last thing, why did you install an older driver version?
Best of luck,
GreyCatz.