Yesterday I bought my first HP laptop ever and I'm facing this problem. Every time I try to hibernate my computer, screen turns off for a few seconds, and then suddenly it turns on again and it's on login screen, as if I would've locked it. What should I do? I tried basically every solution I could find on google - it still doesn't work.
HP ProBook 450 G1
Intel Core i5-4200M
Radeon HD 8750M
8GB RAM
Windows 7 Ultimate